可用于治疗心力衰竭的β受体阻滞剂为（）
A.普萘洛尔
B.阿替洛尔
C.比萘洛尔
D.柳氨苄心定
E.布新洛尔
参考答案：C
根据句意用所给动词的适当形式填空。
1. We all know that a year (divide) into four seasons.
2. "Hero" is an ancient (古代的) costume film___________ (direct) by Zhang Yimou.
3. China succeeded in ___________ (send) up Shengzhou Ⅵ spaceship on October 12,2005.
4. They (quarrel) with each other last night.
5. Kids don't know how (achieve) a balance between work and play.
哪项不是相关需求？（）
A.原材料
B.在制品
C.成品
D.外购零件
E.产品说明书
