验光配镜可选用( )
A.毒扁豆碱B.阿托品C.山莨菪碱D.新斯的明E.东莨菪碱
参考答案:B
解析: 阿托品可阻断睫状肌的胆碱M受体,使睫状肌松弛,从而准确测定屈光度。
—The boys of Class Two are going to the seaside this weekend.
—Um, remember _______ them _______ in the sea alone. It's dangerous. [ ]
A. to tell; not to swim
B. telling; swimming
C. to tell; swimming
D. telling; to not swim
燃油系统的系泊试验应注意哪些事项?