填空题A (36) of the physical and chemical nature of life must begin, not on the Earth, but in the Sun. In fact, it is at the Sun's very center. It is here that is to be found the source of the energy that the Sun (37) pours out into space as light and heat. This energy is liberated at the center of the Sun as billions upon billions of nuclei of hydrogen atoms (38) with each other and fuse together to form nuclei of helium (氦). And, in doing so, it (39) some of the energy that is stored in the nuclei of atoms. The output of light and heat of the Sun requires that some 600 million tons of hydrogen be (40) into helium in the Sun every second. This the Sun has been doing for several thousands of millions of years. The nuclear energy is released at the Sun's center as high-energy gamma (41) , a form of electro-magnetic radiation like light and radio waves, only of very much shorter (42) This gamma radiation is (43) by atoms inside the Sun, to be re-emitted at slightly longer wavelengths. This radiation, in its turn, is absorbed and re-emitted. (44) , it passes through the X-ray part of the spectrum (频谱), eventually becoming light. At this stage, it has reached what we call: the solar surface and can escape into space, (45) A very small fraction of the Sun's light and heat is emitted in such directions (46) .

填空题conform, confirm, perform, reform, transform

填空题Women earn less money than men even if they do the same type of work.

填空题H5N1 could evolve into a potential pandemic that way, or by recombining with human flu.

填空题__________________________ (别太想当然) all people will agree to your suggestion.

填空题 Around 120 years ago, Ebbinghaus began his study of memory. He{{U}} (36) {{/U}}on studying how quickly the human mind can remember{{U}} (37) {{/U}}. One result of his research is known as the total time hypothesis (假设), which simply means the amount you learn{{U}} (38) {{/U}}on the time you spend trying to learn it. This can be taken as our first rule of learning. Although it is usually true that studying for four hours is better than studying for one, there is still the question of how we should use the four hours. For example, is it better to study for four hours{{U}} (39) {{/U}}or to study for one hour a day for four days in a{{U}} (40) {{/U}}?The answer, as you may have{{U}} (41) {{/U}}, is that it is better to spread out the study times. This{{U}} (42) {{/U}}through which we can learn more{{U}} (43) {{/U}}by dividing our practice time, is known as the distribution of practice effect. Thus,{{U}} (44) {{/U}}. But we're not finished yet. We haven't considered how we should study over very short periods of time.{{U}} (45) {{/U}}. Should you look at the same word in rapid succession, or look at the word and then have some delay before you look at it again?{{U}} (46) {{/U}}.

填空题Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 26 to 33 with the exact words you have just heard. For blanks numbered from 34 to 36 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written. Crime is increasing worldwide. There is every reason to believe the{{U}} {{U}} 1 {{/U}} {{/U}}will continue through the next few decades. Crime rates have always been high in multicultural, industrialized societies such as the United States, but a new{{U}} {{U}} 2 {{/U}} {{/U}}has appeared on the world{{U}} {{U}} 3 {{/U}} {{/U}}rapidly rising crime rates in nations that previously reported few{{U}} {{U}} 4 {{/U}} {{/U}}. Street crimes such as robbery, rape{{U}} {{U}} 5 {{/U}} {{/U}}and auto theft are clearly rising{{U}} {{U}} 6 {{/U}} {{/U}}in eastern European countries such as Hungary and in western European nations such as the United Kingdom.What is driving this crime{{U}} {{U}} 7 {{/U}} {{/U}}? There are no simple answers. Still, there are certain conditions{{U}} {{U}} 8 {{/U}} {{/U}}with rising crime increasing heterogeneity of populations, greater cultural pluralism, higher immigration, democratization of government,{{U}} {{U}} 9 {{/U}} {{/U}} These conditions are increasingly observable around the world. For instance, cultures that were previously isolated and homogeneous, such as Japan, Denmark and Greece{{U}} {{U}} 10 {{/U}} {{/U}}Multiculturalism can be a rewarding, enriching experience, but it can also lead to a clash of values. Heterogeneity in societies will be the rule in the twenty-first century, and{{U}} {{U}} 11 {{/U}} {{/U}}

填空题The more we know, __________________(我们越发现自己的无知).

填空题S4. Picasso was{{U}} S4 {{/U}}years old when he painted the picture of Gertrude Stein.