地上油品、液化石油气和天然气管道始、末端和分支处的接地装置的接地电阻不应大于()。A

题型:单项选择题

问题:

地上油品、液化石油气和天然气管道始、末端和分支处的接地装置的接地电阻不应大于()。

A.4Ω 

B.10Ω 

C.30Ω 

D.100Ω

考点:一级消防工程师一级消防工程师综合练习一级消防工程师综合练习题库
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在如图所示的x-t图象中,能表示质点全过程中作匀速直线运动的是(  )

A.

B.

C.

D.

题型:单项选择题
There once was a King who offered a prize to the artist who would paint the best picture of peace. Many artists _____1_____. The King looked at all the pictures, but there were only two he ____2_____
liked and he had to choose between them.
One picture was of a ___3___ lake. The lake was a perfect mirror for peaceful towering ___4____ were all around it. Overhead was a blue sky with fluffy white clouds. All who saw this picture thought that it was a _____5_____ picture of peace.
The other picture had mountains too. But there were rugged and ____6____. Above was an ____7____ sky from which rain fell, in which lightening ____8____. Down the side of the mountain tumbled a foaming waterfall. This did not look ____9____at all.
But when the King looked, he saw behind the waterfall a tiny ____10____growing in a crack in the rock. In the bush a mother bird had built her ____11____. There, in the midst of the rush of angry water, ____12____ the mother bird on her nest…perfect peace.
Which picture do you think won the prize?
The King ____13____ the second picture.
Do you know why?
“Because,” explained the king, “peace does not mean to be in a place where there is no noise, ___14___, or hard work. Peace means to be in the midst of all those things and still be calm in your ____15___. That is the real meaning of peace.”
小题1:
A.tiedB.triedC.diedD.mined
小题2:
A.probablyB.generallyC.reallyD.finally
小题3:
A.calmB.cleanC.clearD.beautiful
小题4:
A.housesB.mountainsC.fieldsD.deserts
小题5:
A.awfulB.fearfulC.terribleD.perfect
小题6:
A.bareB.thickC.strongD.handsome
小题7:
A.sunnyB.happyC.angryD.kind
小题8:
A.predictedB.drownedC.expectedD.played
小题9:
A.dreadfulB.peacefulC.gratefulD.respectful
小题10:
A.treeB.grassC.bushD.flower
小题11:
A.roomB.kitchenC.toiletD.nest
小题12:
A.satB.trembledC.shookD.strained
小题13:
A.removedB.choseC.abandonedD.postponed
小题14:
A.excitementB.happinessC.troubleD.joy
小题15:
A.handB.mouthC.stomachD.heart
题型:单项选择题

适用于瓷器,但不适用于玻璃器皿的消毒方法是()。

A.煮沸消毒法

B.蒸汽消毒法

C.干烤法

D.紫外线消毒法

题型:单项选择题

均价

题型:单项选择题

晶界的影响。

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