腺苷的不良反应除了（）
A.房室传导阻滞
B.胸部压迫感
C.呼吸困难
D.窦性心动过缓
E.头晕、头痛
参考答案：E
New ways have to be found to ______ wildlife being endangered. Which of the following is not OK? [ ]
A. keep
B. protect
C. prevent
D. stop
简单染色
