选择现场用压力表的量程时,应使常用点压力落在仪表量程的()之间。
A、1/4~2/3;
B、1/3~2/3;
C、1/3~3/4;
D、1/4~3/4。
参考答案:B
I must return the two books to the library. I ______ them for half a month. [ ]
A. borrowed
B. kept
C. have kept
D. have borrowed