A moving object will not accelerate or decelerate （）a force is applied to it.
A、whether

B、if

C、unless

D、till

有疑问？点此联系我们收藏该题

查看答案

相关问题推荐

If you notice smoke coming fro the crankcase exhaust fan outlet of an operating diesel engine, you would suspect（）
A、a cracked cylinder liner

B、clogged intake ports

C、broken piston rings

D、a faulty head gasket

查看答案
Inductance is the property of an electric circuit that （）
A、opposes any change in the applied voltage

B、opposes any change in the current flow through the circuit

C、aids any changes in the applied voltage

D、aids any changes in the current through the circuit

查看答案
On a multistage flash-type evaporator, the flash chamber is （）
A、combined as part of the salt water feed heater

B、the open area above the brine levels in the first and second stages

C、combined as part of the distillate cooler

D、another term used to describe the vapor feed heater

查看答案
If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）
A、a broken shaft on the freshwater pump

B、an excessive accumulation of scale exchanger

C、an incorrect thermostatic element operating range

D、lube oil in the cooling water

查看答案
The emergency generator or emergency battery is connected to（） on most large ships.
A、distribution boards

B、section boards

C、emergency switch boards

D、main switch boards

查看答案

最新解决用户提交的题

It is because she is too young ______ she does not know how to deal with the situation.

A. so

B. that

C. so that

D. therefore
查看答案
The moon gives ______ no light of its own.

A. off 发出，发光

B. up 放弃

C. in 屈服

D. away
查看答案
The announcement says that the class meeting will be ______ at 7 o'clock Tuesday evening.

A. taken

B. made

C. placed

D. held
查看答案
I hate those people who think they are superiorme without any reason.
A. at B. on C. to D. than
查看答案
Food and shelter are _____ for human beings.
A. special B. especial C. essential D. exceptional
查看答案