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【简答题】
分析下图所示组合逻辑电路的功能,要求列出真值表,画出输入变量和输出函数的对应波形。
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皮皮学刷刷变学霸
举一反三
【单选题】Tina was shopping on the street ______ it began to rain. [ ]
A.
when
B.
while
C.
then
D.
/
【简答题】Jeff has the ______ (习惯)of listening to music while reading.
【简答题】设X是距离空间， 是闭集。如果A是第二类型集，则A包含X中的某个闭球。
【单选题】---Tina, can I use your English dictionary for a short while ? ---___________. ____________.
A.
Yes, you can . Here are you !
B.
Sure . Here it is !
C.
Yes , you can . Here you are !
D.
Sure . Here is it !
【简答题】设{F k }是R n 中的非空闭集列，x 0 ∈R n ，若有 ，试证明 是闭集．
【单选题】Tina _____ reading while her brother was listening to music. A. were B. was C. did
A.
were
B.
was
C.
did
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