十进制数99,表示成二进制数是(),8进制数是()。
参考答案:1100011;143
7.Your mother is coming. What present_______for your birthday?
A.you think she has got
B.you think she has got
C.do you think she has got
D.do you think has she got
验光中,用±0.25DC交叉柱镜对-3.00DS/-0.75DC*90镜度作轴向调试翻转交叉柱镜两面,其中交叉柱镜的正轴在45的一面视力提高,应将测试的()。
A.轴向改为80
B.轴向改为100
C.镜度改为-3.00DS/-0.25DC*90
D.镜度改为-3.25DS/-0.25DC*90