【单选题】
6. 毛果芸香碱缩瞳是：
①
激动瞳孔扩大肌的α受体，使其收缩
②
激动瞳孔括约肌的M受体，使其收缩
③
阻断瞳孔扩大肌的α受体，使其收缩
④
阻断瞳孔括约肌的M受体，使其收缩
⑤
阻断瞳孔括约肌的M受体，使其松弛
【单选题】
6. He is now___________the company.
①
in doubt
②
in possession of
③
in a hurry
④
in a sense
【单选题】
6. A new house ___ at the corner of the road.
①
is building
②
is being built
③
been built
④
be building
【单选题】
6. Was it in this palace________ the last emperor died?
①
that
②
in which
③
in where
④
which
【单选题】
6. 下面哪个配对是错误的？_____。
①
A．赤脚医生：barefoot doctor
②
B．纸老虎：paper tiger
③
C．to show one’s cards：摊牌
④
D．大海捞针：look for a needle in sea