调整目镜的目的是为了补偿测量者的什么屈光异常,使被测的镜片度数误差减小到最小?()
A.远视
B.近视和远视
C.近视
D.近视和远视散光
E.以上都对
参考答案:B
琥珀胆碱禁用于:
A.需作食管镜患者
B.精神分裂症患者
C.清醒患者
D.儿童
E.老年
What is your opinion on Miss Liu’s request that we______spend half an hour reading English aloud every morning?
A.must
B.should
C.would
D.shall