试题与答案

"Goodbye, then,"she said, without even _

题型:选择题

题目:

"Goodbye, then,"she said, without even ________ from her book.                        

A.looking down

B.looking up

C.looking away

D.looking on

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A解析: 计算表达式!a<b,先计算!a,因a的值为10,!a的值为0,而关系表达式0<20为真,所以表达式!a<b的值为1。

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