更多"[单选题] Sometimes a tropical storm mo"的相关试题:
[单选题] The speed at which a storm centre moves is the ______.
A. speed of movement
B. speed of advance
C. speed of storm
D. storm movement speed
[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] SEVERE TROPICAL STORM UPGRADED INTO A TYPHOON AND AT 1800Z 13 AUGUST IT WAS ESTIMATED BASED ON SURFACE REPORTS．This phrase is likely to be under the heading of ______．
A.GALE WARNING
B.24 HOURS FORECAST
C.SYNOPSIS
D.STORM WARNING
[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] While steaming slowly in the harbor，no ship is ______ to exceed the speed limited.
A. assumed
B. appreciated
C. promised
D. permitted
[单选题]When the ship moves forward,after reversing,the engine is restarted but the crankshaft rotates in
A.the astern direction
B.the right direction
C.the ahead direction
D.the left direction
[单选题] OWING TROPICAL STORM9706 CROSSING OUR/COURSE PLS PERMIT SHELTERING KAGOSHIMA KAIWAN．This cable indicates that ______．
A.She requested shelter permission
B.She intended to berth at port of KAGOSHIMA
C.She intended to change her course
D.She was reporting to the port that a tropical storm is coming
[单选题] A tropical storm is building strength some distance from your ship．Waves are coming from the east，with periods increasing from 5 seconds to 15 seconds．The swell is from the east．Where was the storm when these new swells were generated ________．
A.To the north of you
B.To the south of you
C.To the east of you
D.To the west of you
[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]CH2SO4=1mol/LH2SO4 溶液,表示 1L 溶液中含有 H2SO4( )g。
A.98.08
B.49.04
C.98
D.49
[判断题]尾部受热面的低温腐蚀是由于SO2氧化成SO3，而SO3又与烟气中蒸汽结合，形成酸蒸汽。
A.正确
B.错误
[判断题]尾部受热面的低温腐蚀主要原因是由于SO2氧化成SO3，而SO3又与烟气中蒸汽结合形成酸蒸汽。
A.正确
B.错误
[判断题]在下列变化中SO2→S，SO2 起还原剂的作用。
A.正确
B.错误
[单选题] 当某密闭容器中建立了化学平衡 SO2+NO2 SO3+NO 后,若往容器中通入 少量氧气时,将会发生的变化是( )。
A.化学平衡向正反应方向移动
B.化学平衡向逆反应方向移动
C.化学平衡不移动
D.容器内反应速度加快(正、逆速度均加快)
[单选题] 工业上对反应 2SO2+O2 2SO3+Q 使用催化剂的目的是( )
A.扩大反应物的接触面
B.促使平衡向正反应方向移动
C.缩短达到平衡所需的时间,提高 SO2 的转化率
D.增大产品的产量
[单选题] 要同时除去 SO2 气体中的 SO3(气)和水蒸气,应将气体通入( )
A.NaOH 溶液
B.饱和 NaHSO3 溶液
C.浓 H2 SO4
D.CaO 粉末
