为扩大防护范围,一般复列式光电门的光电装置距轿厢地坎0.5m高处装一对,距地坎()m高处装一对。
A.0.5
B.1.0
C.1.2
D.1.5
参考答案:D
--- How was your trip to New York, Jennifer?
--- Fantastic! That was the first time I _______ to such a big city. It’s so impressive.
A.have taken
B.had taken
C.have been taken
D.had been taken
在额部,两眉头中间的腧穴是()
A.水沟
B.攒竹
C.印堂
D.大椎
E.百会