液压系统耐压状况检查主要定期对系统液压管路、()的耐压情况进行检查。
A、管接头
B、接头处
C、管口
D、液压元件
参考答案:D
.
______, higher and higher,until it was a small dot in the sky.
A.It up flew
B.Up flew it
C.Up it flew
D.Up did it fly
腿法击中对方头部,对方倒地得()
A.1分
B.2分
C.3分
D.4分