He put a paper wedge under the table to______it
A. paralyze
B. stabilize
C. minimize
D. jeopardize
查看答案
Which of the following is not true according to the passage？
A. Bird wings have to support the bird.
Bird wings must act as the bird's engine.
C. Airplane's wings must act as the airplane's engine.
D. Similar wing shapes in aircraft and birds produce similar flight capabilities.
There are different______of books in a library.
A. species
B. biographies
C. categories
D. catastrophes
______is forbidden in some states in the United States for religious reasons, while it is
A. Conception
B. Abortion
C. Delivery
D. Perception
与1952年相比，1978年中国科技人员增加了()。
A. 392000人
B. 39.2万人
C. 3920000人
D. 392千人
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