若有定义int a=7;float b;则执行b=1.5+a/4;语句后,变量b值的有效值为( )。
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对于变量x、y、z,语句z=(x=6)+(y=7);执行后,x、y、z的值分别是( )( )( )。
用第三条件句完成句子。 I wanted to send you an email, but I didn't have your email address. If I had had your adress, I ______________ (send) you an email.
用第三条件句完成句子。 I took a taxi to the hotle, but the traffic was bad.It _________ (be) quicker if I had walked.
用第三条件句完成句子。Unfortunately I lost my phone, so I couldn't call you. If I ________ (not lose) my phone, I would have called you.