Terex3311E汽车中储能器的作用?
参考答案:
有两个储能器,分别用于前后两条制动回路。后储能器还用来保持驻车制动回路中的压力恒定,使车辆运行时能够释放驻车制动。
亚洲人口稠密的地区主要在 [ ]
A.东部、西部
B.南部、西部
C.东部、南部
D.南部、中部
选择括号内恰当的单词或词组填入空白处,使句意完整、正确。
小题1:—Anna looks happy, she _______(succeeds,fails)in the match
—We are proud of her.
小题2:—What’s the matter?
—I have some_______(education,difficulty) in math.
小题3:—Sandy doesn’t do well in English.
—Yes,she is_______(weak,week)in English
小题4:The old man often _____(prints,provides)the poor children with clothes.
小题5:With the ________(development, develop) of China,children can get a good education.