---Does ____ of the two foreigners work in Chengdu?

---Yes.____ of them have been working here as English teachers for three years now.

A．any; Both

B．either; All

C．either; Both

D．both, Both

生何首乌用黑豆汁蒸制后减弱了滑肠致泻的副作用的原因是（）

A.总蒽醌含量减少

B.总蒽醌含量增多

C.结合型蒽醌水解成游离型蒽醌

D.卵磷脂含量增加

E.卵磷脂含量降低