用DJ6型经纬仪测某竖直角,盘左读数76°45′12″,盘右读数283°14′36″,指标差应为()。
A.06″
B.-06″
C.12″
D.-12″
参考答案:B
You should inspect the wheels regularly, and replace them ______ they cause you trouble.
A.while
B.as
C.before
D.until
经 * * 性前列腺切除,术中应用大量 * * 冲洗液可引起
A.高血钾症
B.高血钠症
C.低血钾症
D.低血钠症
E.高血钾或高血钠