普萘洛尔(普萘洛尔)的禁忌证是()
A．甲状腺功能亢进
B．心律失常
C．心绞痛
D．高血压
E．支气管哮喘
参考答案：E
They put their books____to make the library clean and tidy.
A．under the chair
B．on the floor
C．behind the door
D．in the bookcase
幼叶的生长一般是[ ]
A．全面扩展
B．叶脉先扩展，叶肉后扩展
C．部分扩展
D．按雏形放大
