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【简答题】
已知示波器偏转灵敏度D y =0.2V/cm，荧光屏有效宽度10cm。若想在屏上显示10个周期该信号的波形，扫描速度大？
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举一反三
【单选题】900 English words by the time I am ten.
A.
learned
B.
is learning
C.
will have been learned
D.
are learnt
【单选题】私には、世界のあちこちに友達がいて、人形を送ってくれる。そういう人形をタンスの上に飾り始めたところ、それが、いつのまにかものすごい数になった。今やタンスの上が人形( )になってしまった。 a.だらけ b.のままに c.なんかに d.ぬきに
A.
a
B.
b
C.
c
D.
d
【单选题】I 900 English words by the time I was ten.
A.
learned
B.
was learning
C.
had learned
D.
learnt
【单选题】I _____900 English words by the time I was ten.
A.
leraned
B.
was learning
C.
had learned
D.
leant
【单选题】I____900 English words by the time I was ten.
A.
learned
B.
was learning
C.
had leaned
D.
learnt
【单选题】设有如下数组定义 , 则正确的叙述为 ________ 。 char x[ ] = {"abcdefg"}; char y[ ] = {'a', 'b', 'c', 'd', 'e', 'f', 'g'};
A.
数组 x 和数组 y 等价
B.
数组 x 和数组 y 的长度相同
C.
数组 x 的长度大于数组 y 的长度
D.
数组 x 的长度小于数组 y 的长度
【单选题】I 900 English words by the time I was ten.
A.
learned
B.
was learning
C.
had learned
D.
learnet
【单选题】900 English words by the time I am ten.
A.
have learned
B.
is learning
C.
are learnt
D.
will have been learned
【简答题】在事故树中,位于基本事件和顶事件之间的结果事件称为 ____ 事件,达种事件既是某个逻辑门的输出事件,同时又是别的逻辑门的输入事件。
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【单选题】I 900 English words by the time I was ten.
A.
learned
B.
was learning
C.
had learned
D.
learnet