It is very necessary that each cylinder （） before the charged air is compressed.

时间：2019-04-13 18:44:48 关键词：necessary,that,each

It is very necessary that each cylinder （） before the charged air is compressed.

A.is scavenged

B.has been scavenged

C.be scavenged

D.was scavenged

答案解析

C

举一反三

Scavenging is （） of exhaust gases by blowing in fresh air.

There is an injection pump for each cylinder which is usually operated once every cycle by （） on the camshaft.

A number of cylinder liners are enclosed in one cast iron casing to form a （）.

On the top of the cylinder is mounted the cylinder cover which is pressed onto （） of the cylinder liner by means of nuts and studs.

It is very necessary that each cylinder （） before the charged air is compressed.

考题搜索

最新问题

每支代维队伍钳型电流表最低配置标准为（）。

每支代维队伍笔记本最低配置标准为（）。

每支代维队伍必须配置一台黄马甲。（）

Windows98注册表的操作有（）。

Solaris系统使用什么命令查看已有补丁列表？（）

下列哪种硬件设置通常必须在内置调制解调器上配置（）

Windows7系统对内存的最低配置要求为（）。

TRICON控制器是一种：（）控制器

NPC在销户指令生效前（）个大额支付系统工作日日终后将撤销清算账户置为待销户状态并将账户状态变更通知通过大额支付系统发送各CCPC。

耐久跑中的途中跑要求跑的节奏与（）节奏相配合。