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【单选题】
在5v的电源电压下，测试CD4069的逻辑功能时，发现某个非门的输出高电平为480mv，低电平为0V，可能的原因是A.
探头上的比例开关设置为 10X ，示波器菜单中设置为了 1X
B.
探头上的比例开关设置为 1X ，示波器菜单中设置为了 10X
C.
探头上的比例开关设置为 10X ，示波器菜单中设置为了 10X
D.
探头上的比例开关设置为 1X ，示波器菜单中设置为了 1X
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举一反三
【单选题】He didn't tell us ______
A.
if he will give us a lecture
B.
whether he would go with you
C.
when he has study
D.
when he will arrive
【单选题】What does the first part of this text tell us?
A.
Illness makes you unhappy and sad.
B.
If you lie on bed, you must be ill.
C.
If you don't want to work, you must be ill.
【单选题】The author wants to tell us in the first part____.
A.
why doctors don't always tell the truth
B.
the benefits of not knowing the seriousness of an illness
C.
why sometimes doctors lie especially to seriously ill patients
D.
to have a routine physical checkup
【单选题】Which book might be thought by the author as having the least value?
A.
The Art of War.
B.
Leadership Secrets of Attila the Hun.
C.
The Fine Art of Success.
D.
Why I Write.
【简答题】Theauthor wants to tell us in this part _____.A. why doctors don't always tell the truth B. the benefits of not knowing the seriousness of an illness C. why sometimes doctors lie especially to serious...
【简答题】A book might ______________ by Tom.
【单选题】(part B )What does the passage mainly tell us?
A.
Learning a foreign language depends on a good memory.
B.
None of us can live without menmory.
C.
Our memories are truly amazing.
D.
How well we remember things is affected by various factors.
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