In the diesel engine,the fuel injector sprays（）.

A diesel engine is similar to a gasoline engine except that the former has no _____.

A.cross-head

B.cylinder

C.connecting rod

D.spark plug

A controllable pitch propeller on a diesel driven vessel eliminates the need for

A.friction clutches

B.disconnect clutches

C.reversing gears

D.reduction gears

如图所示为理想的狄赛尔(Diesel)内燃机循环过程，它由两绝热线AB、CD，等压线BC及等体线DA组成．试证此内燃机的效率为

“Movement of engine no longer required.” means “______”.

A.Stop Engine

B.No Engine Revolutions

C.Stand-by Engine

D.Finished With Engine

A.发动机

B.客舱

C.鼻子

D.尾巴

A.仅仅是Ⅰ

B.仅仅是Ⅱ

C.Ⅰ~Ⅲ

D.Ⅰ+Ⅱ

A.gives up

B.gives in

C.gives off

D.gives away

A.ENGINE和COLLATE

B.ENGINE和CHARSET

C.CHARSET和COLLATE

D.以上答案都不正确

A.Node Engine对接企业内网，采用防火墙隔离

B.严格定义数据访问权限，防止非法访问，防DDOS攻击等

C.Node Engine对接基站、网管、企业网采用不同的网络平面，采用VLAN隔离

D.对接企业内网的网络，采用VLAN及VPN隔离，保证网络安全

E.Node Engine对接企业业务IP与运营商传输网络IP完全隔离