预防休克的错误措施是（）
A.汽车运送时，病员头部置于车头方向
B.保暖、止痛
C.输液、输血
D.控制原发疾病
E.预防过敏反应
参考答案：A
Miss Jones _______ music at Bardon School for five years when she was abroad and now
she is an actress.[ ]
A. taught
B. has taught
C. had taught
D. has been teaching
关于分子筛，下列说法正确的是（）。
A、分子不饱和程度愈大，越易于吸附
B、分子沸点愈低，越易于吸附
C、高温有利于吸附
D、高压有利于吸附
