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【多选题】
电话交换机系统由进行通话的话路系统和连接话路的控制系统构成。话路系统包括（）。A.
用户电路设备
B.
交换网络
C.
出中继器、入中继器、
D.
绳路
E.
具有监视功能的信号
F.
以上都不对
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【简答题】设A是三阶实对称矩阵，r(A)=1，A 2 一3A=0，设(1，1，一1) T 为A的非零特征值对应的特征向量．(1)求A的特征值；(2)求矩阵A．
【单选题】根据以下资料，回答下列各题。 It is widely known that any English conversation begins with The Weather．Such a fixation with the weather finds expression in Dr.Johnson’s famous comment that “When two English meet, th...
B.
Dr.Johnson is famous for his weather observation
C.
the comment was accurate two hundred years ago
D.
English conversations usually start with the weather
【单选题】平面四杆机构存在曲柄的条件中,曲柄为( )构件,最短与最长构件长度之和( )其它两构件之和
A.
最长;大于或等于
B.
最短;大于或等于
C.
最长;小于或等于
D.
最短;小于或等于
【单选题】Ted, there’s a boy at front door who says he has news for you.
A.
the; /
B.
the; the
C.
/ ; the
D.
/ ; /
【单选题】It is widely reported in the western media that the drug ______ is now becoming a leading cause of teenager crimes.
A.
adoption
B.
abuse
C.
appreciation
D.
appeal
【单选题】听力原文：W: Ted, I'm leaving you. Ted, here are my keys. Here's my American Express Card, my Bloomingdale's Credit Card, and my check book. I've taken 2,000 dollars out of our savings account because that...
A.
Her keys.
B.
Her American Express Card.
C.
Her Blooming dale's Credit Card.
D.
Her visa card.
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