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【单选题】
P1DIR=1这一语句的意思是( )。A.
使P1输出1
B.
使P1_1输出1
C.
设置P1的方向为输出
D.
设置P1_1的方向为输出
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举一反三
【单选题】The passage suggests that the Chicanos who 'raise hell' on Saturday night and go to church the next morning ______.
A.
are very religious
B.
are just trying to have a good time on the weekends
C.
come to church under the influence of alcohol
D.
have both a fun-loving and a serious side to their personality
【简答题】已知离散型随机变量X在2,4,6,7,9共5个值上等概率分布,则E[X]= 。
【单选题】Who in the Church doesn't? What does this question mean?
A.
Everyone in the church knows him.
B.
Nobody in the church knows him.
C.
Who is in the church?
D.
Who knows him in the church?
【单选题】有 3 个产地 4 个销地的平衡运输问题模型具有特征 ___________ 。
A.
有 7 个变量
B.
有 12 个约束
C.
有 6 个约束
D.
有 6 个基变量
【简答题】已知离散型随机变量X在2,4,6,8,10共5个值上等概率分布,则E[X]= 。
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