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【单选题】
对下面三条语句(其中s1和s2为内嵌语句),正确的论断是______。A.
）if(a) s1; else s2;
B.
）if(a==0)s2; else s1;
C.
）if(a!=0) s1;else s2;
D.
三者相互等价
E.
（1）和（2）等价，但与（3）不等价
F.
三者互不等价
G.
（1）和（3）等价，但与（2）不等价
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反馈参考答案：
举一反三
【简答题】You ________ him so closely you should have kept your distance. A) shouldn’t follow B) mustn’t follow C) couldn’t’ have been following D) shouldn’t have been following
【单选题】---Why do you keep looking back? ---I have a feeling that we _______.
A.
were followed
B.
have been followed
C.
are being followed
D.
are following
【单选题】听力原文：You have reached the inquiry system of Parson's Telecommunications. Dial 011 followed by the extension number if you wish to speak to an employee. For information regarding our services and offer...
A.
Employees.
B.
Software programmers.
C.
Customers.
D.
Telephone operators.
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