皮皮学,免费搜题
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搜题
【单选题】
倒T形电阻网络D/A转换器的特点是()
A.
电阻差值太大
B.
转换速度慢
C.
精度太低
D.
转换速度快
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参考解析:
知识点:
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举一反三
【单选题】“杂费”栏应填( )。
A.
502/一200/3
B.
502/20/2
C.
502/5 486.42/3
D.
502/一5 486.42/3
【单选题】“运费”栏:
A.
502/2450/1
B.
502/2450/2
C.
502/2450/3
D.
此栏为空
【单选题】She was absent without any excuse.
A.
原谅
B.
对不起
C.
借口,理由
【简答题】估算. 485×5≈ 502×6≈ 396×7≈ 290×8≈ 492×7≈ 104×8≈
【单选题】She was absent __the meeting yesterday because she was ill.
A.
on
B.
in
C.
for
D.
from
【单选题】运费( )
A.
502/2560/3
B.
502/2560/2
C.
502/2560/1
D.
2560/1
【单选题】There ____two pens and a pencil in the pencil box.
A.
is
B.
are
C.
am
【单选题】The girl _____ a colorful pencil. [     ]
A.
there is
B.
there are
C.
have
D.
has
【单选题】How many rubbers _______ in your pencil box? [     ]
A.
there is
B.
there are
C.
is there
D.
are there
【单选题】She was absent through sickness .
A.
disease
B.
illness
C.
recovery
D.
infection