水龙头润滑油被污染变质，会出现（）的故障。
A、油池漏油
B、冲管密封漏失
C、水龙头壳体发热
D、中心管转动不灵
参考答案：C
It's high time you had your hair cut; it's getting ________. [ ]
A. too much long
B. much too long
C. long too much
D. too long much
在预防流行性出血热的措施中，下列哪项最重要（）
A.“三早”预防
B.预防接种
C.灭螨防螨
D.灭鼠防鼠
E.疫情监测
