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【单选题】
画放大器直流通路时电容器视为( ),画放大器的交流通路时直流电源视为( )。A.
开路，断路
B.
电池组，断路
C.
短路，电池组
D.
断路，短路
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【单选题】He was killed after eating the beautiful mushrooms because they contained a deadly . [ ]
A.
poison
B.
protein
C.
waste
D.
food
【简答题】公文发文字号中的序号要使用阿拉伯数字，序号应编虚位。 （ ）
【简答题】公文发文字号中的序号要使用阿拉伯数字，序号应编虚位。( )
【简答题】产妇需注意补充的矿物质包括
【单选题】The patient was warned ________ oily food after the operation..
A.
to eat not
B.
eating not
C.
not to eat
D.
not eating
【单选题】Bacteria in the mouth act _________sugars that remain on the teeth after eating.
A.
with
B.
by
C.
for
D.
on
【单选题】The patient was warned _______oily food after the operation. [ ]
A.
to eat to
B.
eating not
C.
not to eat
D.
not eating
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