专升本英语（阅读理解）模拟试卷1
阅读理解
Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter; a pinhead is about a millimeter across. Rod-shaped bacteria are usually two to four microns long, while rounded ones are generally one micron in diameter. Thus, if you enlarged a rounded bacterium a thousand times, it would be just about the size of a pinhead. An adult human magnified by the same amount would be over a mile (1.6 kilometers) tall.
Even with an ordinary microscope, you must look closely to see bacteria. Using a magnification of 100 times, one finds that bacteria are barely visible as tiny rods or dots. One cannot make out anything of their structure. Using special stains, one can see that some bacteria have attached to them wavy-looking \\
1.Which of the following is true according to the passage?(A)
A. Rod-shaped bacteria are generally larger than rounded ones.
B. If we enlarged a rod-shaped bacterium a thousand times, it would still be smaller than a pinhead.
C. If one used a microscope with a magnification of 100 times, he can see the structure of a bacterium clearly.
D. Water molecules move so quickly that a bacterium can not move in the water.
解析：根据文中第一段“Rod—shaped bacteria are usually two to four microns long，while rounded ones are generally one micron in diameter”，可明显得出rod-shaped bacteria比rounded bacteria要大，故A正确。
2.According to the passage, one who examines bacteria with an ordinary microscope, using a magnification of 100 times will see______.(A)
A. tiny rods
B. stains
C. wavy-looking hairs
D. detailed structures
解析：根据文中第二段前两句“Using a magnification of 100 times，one finds that bacteria aye barely visible as tiny rods or dots”，故选A。
3.The environment around bacteria is always changing because______.(A)
A. molecules around bacteria move very fast
B. the water is as thick as molasses
C. there is a large number of molecules around bacteria
D. new bacteria always replace the old ones
解析：根据文章第三段“Molecules move so rapidly that within a tenth of a second the molecules around a bacterium have all been replaced by new ones”，故选A。
4.The author compares water to molasses in order to show______.(A)
A. how difficult it is for bacteria to move through the water
B. how different the bacterial world is from the human world
C. how the water molecules work
D. what different bacteria one liquid contains from another
解析：由文章第三段前三句可知作者将水比作糖浆是为了说明“水对于细菌来说就相当于糖浆对于人类一样稠，所以细菌在水中运动起来就很困难”，故选A。
5.The relationship between a bacterium and its flagella is most similar to which of the following?(D)
A. A flag attached to a stick.
B. A cowboy on the cow’s back.
C. A door closed by a naughty boy.
D. A boat pushed by the motor.
解析：根据文章第二段最后几句“…some bacteria have attached to them wavy—looking‘hairs’called flagella…The flagella rotate，pushing the bacteria through the water。”可知D更确切。
There is no denying that students should learn something about how computers work, just as we expect them at least to understand that the internal-combustion engine (内燃机) has something to do with burning fuel, expanding gases and pistons being drive. For people should have some basic
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