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【单选题】
运算放大器电路如图所示,欲构成反相比例运算电路,则虚线框内应连接 ( ) 。A.
电阻元件
B.
电感元件
C.
电容元件
D.
电容元件或电阻元件均可
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列关于腹式呼吸的叙述。错误的是
A.
以膈肌运动为主的呼吸
B.
腹式呼吸时也存在胸部运动
C.
儿童和成年男性以腹式呼吸为主
D.
胃肠胀气时以腹式呼吸为主
E.
胸部疾患时以腹式呼吸为主
【单选题】It was a rainy day , but he still got up as early ____ .
A.
he could
B.
as he possible
C.
as usual
D.
as usually
【单选题】He suddenly returned to the small village _____ a rainy morning.
A.
on
B.
at
C.
in
D.
during
【单选题】_____ it is rainy today, _____ he still works outside. [ ]
A.
Although; but
B.
But; although
C.
/; although
D.
Although; /
【单选题】He suddenly appeared on ________ rainy night, which was ________ great surprise to us. [ ]
A.
a; /
B.
a; a
C.
the; a
D.
/; the
【简答题】15-99. 若在Excel单元格中输入00100,则在默认情况下,该单元格的数据显示为_______。
【简答题】变电所主要由( )配电室、低压配电室、( )室、电容器室、值班室等组成。
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