一部大客车，里面有双人椅12张，单人椅8张．一共可以坐多少位乘客？
12×2+8，
=24+8，
=32（位）．
答：一共可以坐32位乘客．
165. In America, the teen-age crime is on the _______. This is what the American public worry most.
A．addition
B．increase
C．increasing
D．Independence
如何测量交流表示灯电源对地电流？
