可使变异型心绞痛病情加剧：
A．烟酸B．考来烯胺C．氯贝丁酯D．硝苯地平E．普萘洛尔
参考答案：E
The guy is always running ______ the other cars on the road, unfortunately he ran his car ______ a tree.
A．after; into
B．after; out
C．away; into
D．into; into
下列属于半合成高分子材料的囊材是（ ）
A．聚乳酸
B．明胶
C．乙基纤维素
D．聚维酮
E．羧甲基纤维素
