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【多选题】
设计一份理想的在线问卷,一般应遵循( )原则A.
目的性
B.
可接受性
C.
简明性
D.
匹配性
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皮皮学刷刷变学霸
举一反三
【单选题】By 'held back' (Line 1) the author means '______. '
A.
made to remain in the same class
B.
forced to study in the lower class
C.
drawn to their studies
D.
prevented from advancing
【单选题】Mybatis进行一对一和一对多关联查询时使用的标签分别是( )
A.
association；collections
B.
association；collection
C.
associations；collections
D.
associations；collection
【单选题】When drawing up a contract, we should ____ the safety measures.
A.
build in
B.
draw in
C.
run in
D.
go in
【单选题】Jenny loves drawing and hopes to be _____ artist when she grows up.
A.
a
B.
an
C.
the
D.
/
【简答题】【5.18】一电阻、电容、电感并联电路,已知R = 125 ,L = 0.8 H,C = 31.8 F,电源电压为220 V,电源的频率为50 Hz。求:1电路的导纳;2各支路电流;3电路的总电流;4电路的平均功率。
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