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【多选题】
整流电源是将电网电压的 转换成 的能量转换电路。
A.
交流电
B.
直流电
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参考答案:
举一反三
【简答题】My sister is really ____________ . She has big blue eyes and long fair hair.
【简答题】预制钢筋混凝土楼板由哪些特点?有几种结构形式?
【简答题】现浇钢筋混凝土楼梯有哪几种做法?板式楼梯、斜梁式楼梯。
【单选题】从结构上可,三极管分为三个区,分别是
A.
基区、发射区和集电区
B.
截止区、饱和区和放大区
C.
基极、发射极和集电极
D.
P区、N区和基区
【单选题】My sister is really a couch patato.She put on 2 kilos during the winnter vacation.She should ________________
A.
get a balanced diet
B.
do more exercise
C.
have enough sleep time
D.
All above
【单选题】My sister is really good at high jump. She jumps ______ than the other students in her school. [     ]
A.
the highest
B.
very high
C.
much higher
D.
too high
【单选题】My sister is really smart. is very good at schoolwork. [     ]
A.
He
B.
His
C.
She
D.
Her
【简答题】My sister is really ____________ (beauty) . She has big blue eyes and long fair hair.
【单选题】My sister is really enthusiastic ______ music.
A.
about
B.
on
C.
with
D.
by
【单选题】下列采购方式能够作为一种宏观调控的手段并对社会宏观经济的运行产生影响的是?
A.
企业采购
B.
政府采购
C.
国内采购
D.
个人采购
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