眼睛辨认5米以上目标的视觉能力低于正常称为（）
A.视力低下
B.近视
C.远视
D.散光
E.弱视
参考答案：B
Miss Huang is new in the office. Now everyone is waiting for her _____ to them. [ ]
A. to introduce herself
B. introducing her
C. introduce her
D. introducing herself
在气动薄膜调节阀中，调节器来的命令一般为（）Mpa的风压信号。
A、0.02～0.05
B、0.01～0.05
C、0.05～0.1
D、0.02～0.1
