前置前驱汽车的横置发动机有（）点固定支撑。
A．3
B．4
C．5
参考答案：B
—You must drive _____next time, or there may be another accident.
—Thanks. I will be much _____from now on.
A．carefully; more carefully
B．more careful; more careful
C．more carefully; more careful
D．more careful; carefully
典型心绞痛患者含服硝酸甘油后，疼痛应在多长时间内缓解（）
A.几秒钟内
B.1～5分钟
C.10～15分钟
D.20分钟左右
E.30分钟以上
