孕35周，子痫，抽搐控制6小时，此时应采取的措施是
A．人工破膜B．剖宫产C．引产D．会阴侧切E．低位产钳术
参考答案：B
The driver can adjust the heating in winter and the air conditioning in summer to suit his own ______.[ ]
A. leisure
B. preference
C. convenience
D. selection
分析USB单端反激式充电器控制电路原理。
