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【判断题】
在题图所示方框图中，若φF＝180°，则只有当φA＝±180°时，电路才能产生正弦波振荡。（ ）【图片】A.
正确
B.
错误
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举一反三
【单选题】T o force Spring to produce a new bean instance each time one is needed, you should declare the bean's scope attribute to be ( ).
A.
request
B.
prototype
C.
singleton
D.
session
【多选题】麦克利兰的成就需要激励论主要研究在人的生理需要基本得到满足的前提条件下，人们还有( )等的需要。
A.
相互关系的需要
B.
权力的需要
C.
成长和发展的需要
D.
友谊的需要
E.
成就需要
【简答题】将 20只生长发育状态相似的蝌蚪,平均分成A、B两组,A组饲喂少量甲状腺激素,蝌蚪的个体发育变化迅速,在比较短的时间内就发育成了一群小型青蛙,而不饲喂甲状腺激素的B组蝌蚪则按常规发育. ( 1)此实验说明 .在本实验中 B组实验起到 作用. ( 2)如果要进一步说明甲状腺激素是由甲状腺分泌的,还需要增加一个实验,你认为最合理的设计是: . ( 3)要想在实验室观察青蛙的发育全过程,适宜的培养条件应...
【简答题】p__ d__ t_ attribute to
【简答题】___ , which are issued by a country, or a trading bloc, are the criteria needed to determine the national source of a product . T hey are considered as the rules to attribute a country of origin to a ...
【简答题】Fill in the blank(s) in each sentence with a phrase from the box in its appropriate form. stake a claim, plow into be proportional to tread on attribute ... to, carve out sidle up breathe down sb’ s n...
【简答题】Fill in the blank(s) in each sentence with a phrase from the box in its appropriate form. stake a claim, plow into be proportional to tread on attribute ... to, carve out sidle up breathe down sb’ s n...
【简答题】Fill in the blank(s) in each sentence with a phrase from the box in its appropriate form. stake a claim, plow into be proportional to tread on attribute ... to, carve out sidle up breathe down sb’ s n...
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