更多"[单选题]The piston is forced downward "的相关试题:
[单选题]The simplest means of piston cooling is
A.at splash or spray
B.by splash or spray
C.from splash and spray
D.for splash and spray
[单选题]The piston is in diesel engine.
A.a shaped-pot component
B.a pot-shaped component
C.a pot-shaping component
D.a potted shape component
[单选题]The piston whilengne is in operation moves up and down,thus causing the rotation movemenof the
A.crankcase
B.slipper
C.bearing
D.crankshaft
[单选题]The piston ring should be flat and free from
A.twist
B.smooth
C.constant
D.balance
[单选题]The piston moves up in the cylinder and compresses the charged air while both inlet and out let valves
A.are closed
B.remain half-opened
C.are opened
D.remain haif-closed
[单选题]Piston may be made in aluminum alloy in order to keep the weight for balancing purposes at high speed.
A.up
B.bottom
C.down
D.top
[单选题]The two-stroke cycle begins with the piston coming up from the bottom of its stroke,with the air inlet ports or scavenge ports in the side of the cylinder being
A.uncovered
B.covered
C.opens
D.closed
[单选题]As the piston moves about of the way up,it closes the inlet ports and exhaust ports in the two-stroke diesel engine.
A.one half
B.one third
C.one quarter
D.one fifth
[单选题] Cargo handlers should take the following precautions with the exception of ______ to avoid damage from shifting．
A.Keep the loads as close to the rail or deck as possible
B.If cargo is likely to settle，make provisions to secure it after it has settled
C.Thoroughly secure and shore all cargo so that it cannot move
D.hen stowing cargo，avoid leaving empty paces
[单选题] After a cold front passes，the barometric pressure ______．
A.Drops，and the temperature drops
B.Drops，and the temperature rises
C.Rises，and the temperature drops
D.Rises，and the temperature rises
[单选题]The oil cooler is circulated by sea water,pressure than that of the oil.
A.which is at higher
B.which is at lower
C.which is at less
D.none of the above
[单选题] Environmental groups intend to _____ the pressure until the government changes the law.
A. make up
B. pick up
C. keep up
D. bring up
[单选题]2212.下列表达pre-B受体的细胞是
A.A.祖B细胞
B.B.大前B细胞
C.C.小前B细胞
D.D.未成熟B细胞
E.E.成熟B细胞
[单选题]飞机没有通电的情况下,能否检查气瓶压力（ ）
Can the cylinder pressure be checked on an unpowered aircraft ?
A.能,直接从气瓶的压力表上读出
Yes, on the direct reading pressure gage.
B.不能,ECAM没有电源
No, the ECAM is not powered.
C.能,只要飞机上有电瓶
Yes, providing the batteries are installed.
[单选题]If lubricating oil encounters high temperature it can burn,leaving as it does so
A.carbon deposit
B.rust deposit
C.acidic deposit
D.ash deposit
[单选题]调温空气调压活门（配平空气压力调节活门）由谁控制（ ）The Trim Air Pressure Regulating Valve is contorled by ( )
A.组件控制器 The pack controller
B.区域控制器 The Zone Controller
C.驾驶舱热空气电门The HOT AIR switch
[判断题]电子移交过程中飞行计划传输的几个阶段：预告(Pre—notifying)、通告(notifying)、商议(negoti—ating)、协调进行(coordinating)、协调完成(coordinated)、再商议(Re—nego—tiating)
A.正确
B.错误
[单选题]某个网站部分代码为：Hello ' . $_GET[ 'name' ] . ''; ?>，该写法存在(____)漏洞。
A.SQL注入漏洞
B.文件上传漏洞
C.任意文件读取漏洞
D.XSS漏洞
[单选题]客舱机组在打开客舱门之前，飞行机组必须确认没有剩余压差。飞行机组必须等待CABIN PRESSURE WARNING灯停止闪烁或执行以下两个动作：
A. 检查两部空调组件关，打开一侧驾驶舱滑动窗
B. 选择增压方式人工，MAN V/S CTL人工向上最大。
C. 鼓风扇超控，排风扇超控
