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【多选题】
( 多选 ) 关于振动图象和波的图象,下列说法正确的是 ( )A.
．波的图象反映的是很多质点在同一时刻的位移
B.
．通过波的图象可以找出任一质点在任一时刻的位移
C.
．它们的横坐标都表示时间
D.
．它们的纵坐标都表示质点的位移
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举一反三
【单选题】Compared with the work of Hamilton, what dose the author consider Fisher's work to be?
A.
It is inaccurate but popular, compared with Hamilton's work.
B.
It is accurate, but trivial compared with Hamilton's work.
C.
It is admirable, but not as up-to-date as Hamilton's work.
D.
It is valuable, but at a relatively low level.
【简答题】Mr. Hamilton was considered as a hero because __________
【简答题】磁铁让我们知道了一种神奇的力叫 ( )。
【单选题】如果通心粉价格上升而消费者购买更多的通心粉,我们就可以推断出( )
A.
通心粉是正常商品，而且收入效应大于替代效应
B.
通心粉是正常商品，而且替代效应大于收入效应
C.
通心粉是低档商品，而且收入效应大于替代效应
D.
通心粉是低档商品，而且替代效应大于收入效应
【单选题】To: Rachel Porter From: Sara Hamilton Date: September 15 Subject: Trade Fair for September 23 Dear Ms. Porter, I am sorry for my late response to your e-mail. The division manager has been so busy rec...
A.
They must include an itinerary.
B.
They must be approved by a manager.
C.
They must include receipts.
D.
They must estimate meal costs.
【简答题】A．undermined B．uncovered C．disclosed D．revealed
【简答题】A．undermined B．uncovered C．disclosed D．revealed
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