阿托品用做全身麻醉前给药的目的是()。

A．增强麻醉效果

B．减少呼吸道腺体的分泌

C．预防心动过缓

D．中枢镇静作用

E．解除微血管痉挛

Many Americans do not understand why there is so much international criticism of the US policy on ________change.

A．atmosphere

B．sky

C．weather

D．climate