连续降雨天气，山区公路可能会出现路肩疏松和堤坡坍塌现象，行车时应选择道路中间坚实的路面，避免靠近路边行驶。
参考答案：对
当汽轮机油含水为（）%时，就可能引起金属锈蚀。
A.0.1
B.0.2
C.0.3
D.0.4
The place _______ the bridge is supposed to be built should be________the cross-river traffic is the heaviest.
A．which; where
B．at which; which
C．at which; where
D．which; in which
