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单选题Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.A authorized fire equipment servicing personnel onlyB replacing the propellent cartridge and refilling with powderC puncturing the cartridge seal after insta

题目
单选题
Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.
A

authorized fire equipment servicing personnel only

B

replacing the propellent cartridge and refilling with powder

C

puncturing the cartridge seal after installation

D

recharging the cartridge and refilling it with powder

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相似问题和答案

第1题：

YouareasystemsadministratortroubleshootingaproblemwithaccessingaWebserverrunningWindowsServer2008.Previously，anotheradministratorcreatedandinstalledaservercertificateonthecomputer.UsersreportthattheyareabletoconnecttothesiteusingHTTPbutthattheyreceiveawarninginInternetExplorerwhentryingtoconnectbyHTTPS.YouwanttoenableuserstoconnectusingbothHTTPandHTTPS.YouattempttoaccessthesitebyusinganinstanceofInternetExplorerontheserveritself，andyoureceivethesamewarningmessageforHTTPSconnections.

Howcanyouresolvethisissue？（）


参考答案：C

第2题：

When relieving the helm，the new helmsman should know the ______．

A.Course per magnetic steering compass

B.Gyro error

C.Variation

D.Maximum rudder angle previously used


正确答案：A

第3题：

_________

[A] subsequently [B] presently [C] previously [D] lately


正确答案：C

本题测试词义辨析。由“actually”推出本句是对现在和以前对疾病看法的对比，所以选C

第4题：

I remember seeing her somewhere previously.

A:before
B:ahead
C:seldom
D:secretly

答案：A
解析：
本句意思：我记得以前在某个地方见过她。previously意为“以前，事先”，与before（先 前，从前）意思相近。ahead预先，向前；seldom很少；secretly偷偷地。

第5题：

Some astronomers contend that the universe may be younger than previously believed.

A:predict
B:argue
C:think
D:suggest

答案：B
解析：
句意：一些天文学家声称宇宙很可能比先前认为的还要年轻。画线单词contend意为“争辩，声称，主张”，强调与人争辩自己的想法。A项predict意为“预测”; B项argue 意为“争论，坚决主张”，含与人争论的意思，与画线单词意义相近;C项think意为“认为”;D项suggest意为“提议”。故本题选B。

第6题：

Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?

A.Test the pressure gauge for correct reading

B.Weigh the cartridge

C.Replace the dry chemical

D.Pressure test the discharge hose


正确答案：B

第7题：

A large oil fire on the deck of a ship can be fought most effectively with ______.

A.dry chemical

B.foam

C.high-velocity fog

D.water (cartridge-operated)、


正确答案：B
甲板上大量由油水引起的火灾最有效的扑救方法是泡沫。

第8题：

Recharging a previously used cartridgeoperated drychemical extinguisher is accomplished by______．

A.authorized fire equipment servicing personnel only

B.replacing the propellent cartridge and refilling with powder

C.puncturing the cartridge seal after installation

D.recharging the cartridge and refilling it with powder


正确答案：B
对于以前使用过的驱动式化学干粉灭火器的重新充装通过更换驱动气瓶和再装药粉未完成。

第9题：

I remember seeing her somewhere previously .

A:before
B: ahead
C: seldom
D: secretly

答案：A
解析：
句意为：我记得以前在某个地方见过她。previously意为“以前，事先”，与before（先前，从前）意思相近。ahead意为“预先，向前”; seldom意为“很少”; secretly意为“偷偷地”。

第10题：

Which two statements about the DiffServ  model are true？（）

  • A、a class can be identified as a single application， multiple applications with similar service needs，or be based on the source or destination IP address
  • B、a drawback of the DiffServ field in the MAC header to mark frames into behavior aggregates （BAs）
  • C、DiffServ uses the DiffServ field in the MAC header to mark frames into behavior
  • D、the DiffServ field occupies the same eight bits of the MAC header that were previously used for the ToS field
  • E、the first six high-order bits of the DiffServ field are used to identify the Resource Reservation Protocol （RSVP） value
  • F、the primary goal of DiffServ is scalability

正确答案:A,F

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