车制动系至少包括两套各自独立的制动装置,其中()主要用于停车后防止车滑溜。
A.行车制动装置
B.驻车制动装置
C.气压制动传动装置
D.液压制动传动装置
参考答案:B
根据汉语提示,完成下列单词的拼写,使句意通顺。
小题1:When you cross the road, you must pay attention to your s_____(安全).
小题2:There’s no d that computers are widely used by workers.
小题3:Going to Australia for further education for two month is a very e________(高兴的) and exciting experience for me.
小题4:A car e______ will be held in April in Shanghai. You can see many different kinds of cars.
小题5:No matter where the pop star goes, the fans will f______ him.
GB/T1792测定硫醇硫时,若()共存,与只有硫醇存在相比初始电位应更负。
A.硫醇
B.元素硫
C.硫化氢
D.硫醚