激光照射治疗时，应注意保护（）。
A.心脏
B.头部
C.眼睛
D.脐部
E.腹部
参考答案：C
I don’t think I’ll need any money but I’ll bring some ____________.
A．as last
B．in case
C．once again
D．in time
A ship is inclined at an angle of loll. In the absence of external forces，the righting arm (GZ) is（）.
A.positive
B.negative
C.zero
D.vertical
