精度为1/50mm的游标卡尺,其副尺每格为()。
A.49/50mm
B.19/20mm
C.9/10mm
D.0.02mm
参考答案:A
I met my old friend, Li Ming, but I forgot _____ him for his telephone number. [ ]
A. ask
B. to ask
C. asking
D. asked
After running past the finishing line, she was .
A.out of control
B.out of danger
C.out of breath
D.out of trouble