It is the only possible explanation for the ice ages.
It is too limited to provide a plausible explanation for the ice ages, despite recent research findings.
It cannot be tested and confirmed until further research on volcanic activity is done.
It is one plausible explanation, though not the only one, for the ice ages.
It is not a plausible explanation for the ice ages, although it has opened up promising possibilities for future research.
第1题:
In cold, damp weather, the buildup of ice on airplane wings can pose significant aerodynamic problems. Which of the following effects would you expect?
A.As ice builds up on the top of the wing, drag increases.
B.As ice builds up on the top of the wing, lift increases.
C.As ice builds up on bottom of the wing, lift decreases.
D.All of the above
To answer this question, you need to understand the concepts of lift and drag. You also need to recognize that Table 1 provides the data relevant to the question. Ice building up on top of the wing would increase lift, since the higher the curved upper surface of the wing, the greater the difference between the speed of air moving under the wing and above it. It would also increase drag, as suggested by the third column of Table 1: notice how the wings with the higher upper surface also have greater drag. Finally, ice building up under the wing would decrease the speed of air moving under the wing and so reduce lift. Thus, all three effects would occur.
第2题:
To which of the following is the author most likely to agree?
[A] the rich and the poor are equal in the face of death. [B] more scientists are needed for the medical advancement.
[C] there is a double standard in medical ethics. [D] the dead deserve the same attention as the living.
第3题:
To which of the following statements would McWhorter most likely agree?
[A] Logical thinking is not necessarily related to the way we talk.
[B] Black English can be more expressive than standard English.
[C] Non-standard varieties of human language are just as entertaining.
[D] Of all the varieties, standard English can best convey complex ideas.
第4题:
A customer asks the technician for an explanation of the cause of a printer issue, after the issue is resolved. Which of the following would be the MOST appropriate response?()
第5题:
第6题:
which of the following about the north region in canada is not true?
A. People in this region depend only on arts and crafts for living.
B. The north has rich oil and gas deposits.
C. The north is a scarcely populated area of ice and oceans.
D. Most of the inhabitants are Aboriginal people.
第7题:
第8题:
On which of the following statements would the author most probably agree?
[A] Non-Americans add to the average height of the nation.
[B] Human height is conditioned by the upright posture.
[C] Americans are the tallest on average in the world.
[D] Larger babies tend to become taller in adulthood.
题干中提到“most probably..”,通过排出法,可以确定B为最佳选项。
第9题:
A laser printer keeps printing out crumpled pages from the third tray. Which of the following is the MOST likely explanation?()
第10题:
After running the vmstat command, which of the following would most likely cause the value in the blocked column to be unusually high?()