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【单选题】
表示两个相邻脉冲重复出现的时间间隔参数叫( )。A.
脉冲宽度
B.
脉冲周期
C.
脉冲上升沿（前沿）
D.
脉冲下降沿（后沿）
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【简答题】We think _____ a pity that he didn’t pass the driving test.
【单选题】While I that he is an excellent leader, I didn’t think he can do a good job in this company because he is too rigoro us.
A.
summarize
B.
reflect
C.
acknowledge
D.
recommend
【单选题】李明现场观看NBA勇士队比赛的总效用函数为TU=10Q-Q 2 ,边际效用MU=10-2Q,Q为观看比赛的次数,李明达到效用最大化时,观看比赛的次数是。
A.
10次
B.
20次
C.
15次
D.
5次
【简答题】The ability to laugh at your own weaknesses and blunders has long been recognized as a sign of maturity. And yet this is one of the most difficult __1__ of your sense of humor to develop. Oscar Wilde ...
【简答题】Erik was a four-year-old boy. He thought he was a young man but his parents didn’t think so. They told him, “When you begin to think about 1 others, you’ll be a young man.” One morning, his parent...
【单选题】He insisted that he suffer from heart trouble, but I didn’t think so.
A.
should suffer
B.
has suffered
C.
suffers
D.
was suffering
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