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【单选题】
船舶在风浪中的横摇摆幅取决于()。1船速与波速的关系;2波长与船长的关系;3自由摇摆周期与波浪视周期的接近程度。A.
①
B.
①②
C.
③
D.
①②③
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举一反三
【单选题】— ______ Pat his friend? — Yes, ______ [ ]
A.
Is, he is
B.
Is, Pat is
C.
Are, it is
D.
Do, it's
【单选题】关于单端反激电路的变压器,下列说法错误的是( )
A.
当主开关导通时，电源通过变压器向负载传送能量
B.
变压器在输入电源和输出负载之间起到隔离作用
C.
变压器还需要起到储能元件的作用
D.
变压器两绕组的同名端异侧，可以实现输出电压与输入电源同极性
【单选题】以下程序的输出结果为( ) import re str="what's the time?" pat1="wh.+a" rst1 = re.search(pat1,str) print(rst1)
A.
None
B.
wha
C.
what's the time？
D.
what
【简答题】完形填空。 Sam and Pat are 1 . They're in 2 class. Sam works harder and studies better 3 Pat. One day the teacher asks the students 4 a composition. The name of the composition is 'My mother'. Sam 5 a comp...
【简答题】Aunt Pat's rough, red hands' ▁▁▁a life of hard physical labor.
【简答题】thrust overseas fertile split keen sustain grip reflect identify margin previous hesitate bud whichever slim glow 2. Aunt pat’s rough,red hands __________ a life of hard physical labor.
相关题目：
【单选题】— ______ Pat his friend? — Yes, ______ [ ]
A.
Is, he is
B.
Is, Pat is
C.
Are, it is
D.
Do, it's