Today, I’d like to turn our attention to an area of management often overlooked in traditional management courses: small-business management. Small businesses have gone from being traditional small-town stores selling food or clothing to sophisticated, high-tech enterprises. And in addition to the important products they produce, they create jobs for lots of people because there are so many of them. It’s important for management to keep in mind which of the customers’ needs the business serves, because it can’t serve all their needs. Writing a business plan that everyone in the organization understands and follows will help to provide the necessary focus and direction. It’s important to state clearly what the purpose of the business is. Additionally, each person within the organization must know what tasks to perform in order to fulfill that purpose. Now, if for some reason a business plan doesn’t work, try hard to discover why not, rewrite it, and immediately focus on the new plan. A work of caution, however, never give up a bad plan without replacing it. A business has to have a plan because it can’t afford to waste its limited resources. And, as you know, waste leads to unnecessarily high production costs. Production costs are at the heart of the company’s ability to make a high quality product and sell it at an affordable price.

占楼总结

Today’s lecture will center on prehistoric people of the Nevada desert .Now, most of these prehistoric desert people moved across the countryside throughout the year. You might think that they were wandering aimlessly---far from it! They actually followed a series of carefully planned moves. Where they moved depended on where food was available---places where plants were ripening or fish were spawning. Now often when these people moved, they carried all their possessions on their backs, but if the journey was long, extra food and tools were sometimes stored in caves or beneath rocks. One of these caves is now an exciting archaeological site. Beyond its small opening is a huge underground grotto. Even though the cave’s very large, it was certainly too dark and dusty for the travelers to live in---but it was a great place to hide things, and tremendous amounts of food supplies and artifacts have been found there. The food includes dried fish, seeds, and nuts. The artifacts include stone spear points and knives; the spear points are actually rather small. Here’s a picture of some that were found. You can see their size in relation to the hands holding them.

Well, if there are no more questions I would like to continue our discussion of human evolution by looking at Homo erectus, the earliest of our ancestors who stood upright. Homo erectus lived about one and a half million years ago and was given that name because, at the time the first fossil was discovered, it represented the first primate to stand upright. There is evidence now that Homo erectus had sharper mental skills than their predecessors. They constructed the first standardized tool for hunting and butchering. They created an extraordinary stone implement, a large teardrop-shaped hand ax whose design and symmetry reveal a keen sense of aesthetics. This detailing, along with the ax's utilitarian value, strongly suggests that Homo erectus had the ability to conceive of and execute a design to specification. In addition, Homo erectus was the first hominid to use fire. This discovery enticed them to cook meat, which they could flavor and keep from spoiling by flame, and which paleontologists now believe may have given them a new disease. Some fossil bones of Homo erectus are grossly deformed, and paleontologists have noted that this condition is similar to that found in people today who have been exposed to chronic overdoses of vitamin A. Apparently Homo erectus first got this disease by eating large amounts of animal liver.

I understand your professor has been discussing several Eastern Woodland Indian tribes in your study of Native American cultures. As you have probably learned, the Eastern Woodland Indians get their name from the forest-covered areas of the Eastern United States where they lived. The earliest Woodland cultures date back 9,000 years, but the group we'll focus on dates back only to about 700 A.D. We now call these Native Americans the Mississippian culture, because they settled in the Mississippi River valley. This civilization is known for its flat-topped monuments called temple mounds.They were made of earth and used as temples and official residences. The temple mounds were located in the central square of the city, with the huts of the towns people built in rows around the plaza. The Mississippian people were city dwellers. But some city residents earned their living as farmers, tending the fields of corn, beans, and squash that surrounded the city. The city's artisans made arrow heads, leather goods, pottery and jewelry. Traders came from far away to exchange raw materials for these items. In the slides I'm about to show, you will see models of a Mississippian city.

呃 第二篇听得比较差 明天好好跟读一下，估计舌头又该打结了，可恶的大舌头啊

占楼总结

Located at the NASA Research Center in Iowa is a 5,000-gallon vat of water, and inside the tank is an underwater treadmill designed by Dava Newman, an aerospace engineer. For four years Newman observed scuba divers as they simulated walking on the Moon and on Mars on her underwater moving belt. She wanted to discover how the gravity of the Moon and of Mars would affect human movement. To do this, Newman attached weights to the divers and then lowered them into the tank and onto the treadmill. These weights were carefully adjusted so that the divers could experience underwater the gravity of the Moon and of Mars as they walked on the treadmill. Newman concluded that walking on Mars will probably be easier than walking on the Moon.The Moon has less gravity than Mars does, so at lunar gravity, the divers struggled to keep their balance and walked awkwardly. But at Martian gravity, the divers had greater traction and stability and could easily adjust to a pace of 1.5 miles per hour. As Newman gradually increased the speed of the treadmill, the divers took longer, graceful strides until they comfortably settled into an even quicker pace. Newman also noted that at Martian gravity, the divers needed less oxygen. The data Newman collected will help in the future design of Martian space suits. Compared to lunar space suits, Martian space suits will require smaller air tanks; and, to allow for freer movement, the elbow and knee areas of the space suits will also be altered.

Thank you. It’s great to see so many of you interested in this series on”Survival in Outer Space.” Please excuse the cameras-we’re being videotaped for the local TV stations.
" {+ J8 O2 F% u6 Y! G, O0 z. TTonight I’m going to talk about the most basic aspect of survival-the space suit. When most of you imagine an astronaut, that’s probably the fist thing that comes to mind, right? Well, without spaces suits, it would not be possible for us to survive in space. For example, outer space is a vacuum-there’s no gravity or air pressure; without protection, a body would explode. What’s more, we’d cook in the sun or freeze in the shade-with temperatures ranging from a toasty 300 degrees above to a cool 300 degrees below zero Fahrenheit. The space suit that NASA has developed is truly a marvel. This photo enlargement here is a life-size image of an actual space suit worn by astronauts on the last space shuttle mission. This past is the torso-it’s made of seven extremely durable layers. This thick insulation protects against temperature extremes and radiation. Next is what they call a”bladder” of oxygen-that’s an inflatable sac, filled with oxygen, to simulate atmospheric pressure. This bladder presses against the body with the same force as the Earth’s atmosphere at sea level. The innermost layers provide liquid cooling and ventilation. Despite all the layers, the suit is flexible, allowing free movement so we can work. Another really sophisticated part of the space suit is the helmet. I brought one along to show you. Can I have a volunteer come and demonstrate?

Most people think of astronomers as people who spend their time in cold observatories peering through telescopes every night .In fact, a typical astronomer spends most of his or her time analyzing data and may only be at the telescope a few weeks of the year. Some astronomers work on purely theoretical problems and never use a telescope at all.% z# }0 g% Q* a5 K9 L! p: a; I
You might not know how rarely images are viewed directly through telescopes. The most common way to observe the skies is to photograph them. The process is very simple. First, a photographic plate is coated with a light-sensitive material. The plate is positioned so that the image received by the telescope is recorded on it. Then the image can be developed, enlarged, and published so that many people can study it. Because most astronomical objects are very remote, the light we receive from them is rather feeble But by using a telescope as a camera, long time exposures can be made. In this way, objects can be photographed that are a hundred times too faint to be seen by just looking through a telescope.