调节力等于()
A.调节幅度的倒数
B.调节远点的倒数
C.调节范围的倒数
D.屈光度的倒数
E.调节近点的倒数
参考答案:C
解析:调节力是指眼睛既能看清远处,又能看清近处的能力。
Excuse me, but may I ask you _____? [ ]
A. what business are you in
B. what business you're in
C. in what business are you
D. are you in what business
慢性毒性