电子控制的CVT传动系统在要升档时，其传动带轮的变化是主动带轮的直径变小，从动带轮的直径变大。
参考答案：错
Mr.Smith was_________ to be a doctor but he became a teacher when he grew up.
A．demanded
B．supposed
C．suggested
D．agreed\
首先考虑的检查是
A．CTB．膀胱镜C．尿常规检查D．导尿测试残余尿E．排泄性尿路造影
