题目内容
（请给出正确答案）
[单选题]
Nylon fibers last longer and are stronger than natural fibers _______ silk or cotton.
A.such as
B.as regards
C.as well as
D.as such
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题目内容
（请给出正确答案）
A.such as
B.as regards
C.as well as
D.as such
答案
更多“Nylon fibers last longer and are stronger than natural fibers _______ silk or cotton.”相关的问题
第1题
A．The silk T-shirt in white color.
B．The cotton T-shirt with a slogan or picture.
C．The nylon T-shirt worn on playground.
D．The wool T-shirt worn for work.
第2题
第3题
A.An elegant wool sweater.
B.A water-resistant ski-wear.
C.A tightly-fit leather coat.
D.A nylon hoodie with hat.
第4题
A、Less Crystalline
B、Highly Crystalline
C、Isotropic
D、Charged
第5题
听力原文： A world-champion body builder has no more muscles than does a 90-pound weakling. So what makes him so strong？ What other qualities does be need？
Muscles are made of thousands of stringy fibers—a number that is fixed during childhood—which contract when doing work. Strength does not depend on the number of fibers but on the function of their thickness and how many of them contract simultaneously.
Exercise actually damages the muscles. During the recovery stage, the muscle fibers increase in size. Exercise also trains more muscle fibers to work at one time. If a muscle is weak or untrained, for example, only about 10 percent of its fibers will contract, whereas up to 90 percent of the fibers in a weight lifter's bulky biceps will contract.
Aside from strength, two other ingredients go into making an athlete: fitness and endurance. Fitness is related to the condition of the heart. During exercises, there is an increase in the amount of blood returning to the heart from the muscles. A typical volume for a runner at rest is about 5 quarts a minutes, compared with 30 quarts during a vigorous trial. This greater volume means more work for the heart a muscular balloon that expands and contracts to take in blood and squeeze it out. Like any other muscle, the heart enlarges and gets stronger with routine exercise.
Endurance, or the length of time muscles can work, depends in part on how much fuel—in this case sugar—the muscles can store. A muscle that is continually exercised until it is exhausted of sugar tends to store more when it refuels at the next meal. And more sugar can translate into greater endurance the next time the muscle is put to the test.
(33)
A．Because the fibers of his muscles are very thick.
B．Because he has more muscles.
C．Because his muscles are made of more stringy fibers.
D．Because the number of his muscles was fixed during his childhood.
第6题
A．human organs can be manufactured like appliances
B．people will be as strong and dynamic as supermen
C．human nerves can be replaced by optic fibers
D．lost fingers and limbs will be able to regrow
第7题
A．fill up
B．account for
C．consist Of
D．take out
第8题
W: I recently read that in ten years we’ll be wearing clothes that change with the weather. So when it's cold, our clothes will warm up, and when it's hot, our clothes will cool off.
M: Oh, very funny! So we'll be wearing gigantic clothes with built-in air conditioners and heaters.
W: I'm being serious! Researchers have discovered a method of treating fibers with plastic crystals capable of storing and releasing heat as the temperature fluctuates. These treated' fibers absorb more heat than untreated fibers. Researchers are still working with this, but soon this process will be widespread.
M: That's fascinating. I didn't know that fibers had the capability of storing heat. How does that work？
W: These fibers work with the heat by rearranging their structures. The treated fibers move back and forth between two solid shapes.
M: I don't understand. What kind of shapes do they change into？
W: When the weather gets warmer, the crystals take on cube shapes and absorb heat. When the weather gets cooler, the crystals become cooler and even back to their original tetragonal structure.
M: That's truly unbelievable. You said that it'll be a decade before this type of clothes will be available. What a shame! I don't think I can wait that long.
(20)
A．He is surprised.
B．He is skeptical.
C．He is disgusted.
D．He is alarmed.
第9题
A. When moving its tail rapidly.
B. When finding its preys.
C. When staying without any movement.
D. When bending its body in swimming.
第10题
A．When moving its tail rapidly.
B．When finding its preys.
C．When staying without any movement.
D．When bending its body in swimming.
