紧张性头痛急性发作期的药物治疗以下哪项不宜（）
A.非甾体抗炎药
B.苯钾酸钠咖啡因
C.对乙酰氨基酚
D.阿司匹林
E.麦角胺或二氢麦角胺
参考答案：B
自然选择是指[ ]
A．生物的繁殖能力超越生存环境的承受利
B．生物在生存竞争中适者生存
C．生物的过渡繁殖引起生存竞争
D．根据人类需要选育生物新品种
_________ parents' complaints, some cities have significantly cut school hours to give children more
time for leisure and play. [ ]
A. In exchange for
B. In response to
C. In harmony with
D. In terms of
