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【判断题】
亚健康是指人的身心处于疾病与健康之间的一种健康低质状态,机体虽无明确的疾病,但在躯体上、心理上、人际交往上出现种种不适的感觉和症状,从而呈现出活力、反应能力和对外界适应能力降低的一种生理状态。A.
正确
B.
错误
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举一反三
【单选题】Passage Three You never see him, but they're with you every time you fly. They record where you are going, how fast you're traveling and whether everything on your airplane is functioning normally. Th...
A.
15. What do we know about the black boxes from Air France Flight 447? A) There is still a good chance of their being recovered.
B.
B) There is an urgent need for them to be reconstructed.
C.
C) They have stopped sending homing signals.
D.
D) They were destroyed somewhere near Brazil.
【简答题】What is the best bet to deal with different denominations?
【单选题】一对称波导, 。要使 1.5 μm 的光波在该波导中仅存一个 TE 模,该波导的最大厚度为多少?
A.
4.36 μm
B.
3.10 μm
C.
1.55 μm
D.
2.18 μm
【简答题】You never see them, but they're with you every time you fly. They record where you're going, how fast you're traveling and whether everything on your airplane is functioning normally. Their ability to...
【单选题】Passage Three You never see him, but they're with you every time you fly. They record where you are going, how fast you're traveling and whether everything on your airplane is functioning normally. Th...
A.
11. What does the author say about the black box? A) It ensures the normal functioning of an airplane.
B.
B) The idea for its design comes from a comic book.
C.
C) Its ability to ward off disasters is incredible.
D.
D) It is an indispensable device on an airplane.
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