下列关于防己对心血管作用的叙述，错误的是（）
A.抑制心脏
B.抗心律失常
C.降压
D.抗心肌缺血
E.兴奋心脏
参考答案：E
I'm impressed with his persistence. When he had a problem to solve, he________work at it until he
found an answer. [ ]
A. would
B. might
C. must
D. should
脚踏式制动机主要由几部分组成？
