在铁路线路下通行机动车辆的立交桥涵,其桥涵下净空高度不足()时,应按规定设置限高防护架。
A.2m
B.3m
C.4m
D.5m
参考答案:D
在拍摄人像时,明暗光比一般安排为()
A、1:1
B、2:1
C、3:1
D、4:1
The people in this city have planted()trees along both sides of the streets.
A.a great deal of
B.much
C.a large amount of
D.a lot of