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【单选题】
初学者游泳做浮体练习时，吸足气后，在漂浮的过程中要保持（ ）A.
身体流线型
B.
身体紧张
C.
屏息
D.
缓慢呼气
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举一反三
【单选题】Jack had a fever, he finishing doing his homework yesterday.
A.
Although; but
B.
But; although
C.
Although; /
D.
/;although
【单选题】Why Don Thompson emphasized McDonald s would be focusing on its core products?
A.
New products taste awful and weird.
B.
Core products are kept quality easily.
C.
New products benefit the company little.
D.
Core products are praised by customers.
【简答题】Although he had looked through all the reference material on the subject, he still found it hard to understand this point and her explanation only _____ to his confusion. (A) extended (C) added (B) am...
【单选题】Although he had not studiedvery hard, John had () hope of passing the exam.
A.
little
B.
any
C.
a little
D.
some
【简答题】若系统函数 的极点位于s平面的左半平面,则冲激响应 ____(填增长或衰减);若系统函数 的极点位于s平面的右半平面,则冲激响应 ____(填增长或衰减);
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