在运算电路中，集成运算放大器的反相输入端均为虚地。()
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对于任何一个逻辑函数来讲，其真值表都是唯一的。()
Ms. Fletcher reminds us that editors______.
A. are usually itchy
B. look for mistake
C. often misspell names
D. enjoy reading resumes and writing samples
TTL输入端允许悬空，悬空时相当于输入低电平。()
What is implied in the statement "societys focus on leadership is over-blown"？
A. People put too much emphasis on delegation.
B. People put too much emphasis on leaders.
C. People put too much emphasis on followers.
D. People put too little emphasis on delegation.
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