下列血管中流动着静脉血的是( ) A.肺静脉 B.主动脉 C.肠动脉 D.肺动脉

题型:选择题

问题:

下列血管中流动着静脉血的是(  )

A.肺静脉

B.主动脉

C.肠动脉

D.肺动脉

考点:血液循环
题型:选择题

某大工业客户因生产不足,欲将其部分受电设备停止使用一年,该客户应申请办理()用电业务手续。

题型:选择题
There is an old story about an army of frogs that went jumping through the forest one day when two of them suddenly fell into a deep   1 . All of the other frogs gathered around to look  2 at their two fallen friends. They all began to   3  shake their heads and croak out warnings. “It­­­’s too deep!”said one frog. Another said that there was no   4  they would ever be able to get out   5 .
The two fallen frogs began to continuously jump as they   6  to get out, but the frogs that were   7  kept croaking louder at them that they might as well stop   8  they were as good as dead and just   9  their time. One of the two frogs finally gave up,  10  their advice and died.
The other frog just kept on jumping harder than ever   11  all the loud croaks of disapproval from the frogs around the top of the hole. They kept croaking at him to   12  jumping and save himself from all the   13  and suffering as he jumped and fell back down to the bottom   14 .
Finally, to the   15  of all the other frogs, he jumped right out of the deep hole. The other frogs asked him, “Why did you keep jumping   16   we yelled and croaked at you to stop?” The frog explained to them he was   17  at that time and that he had thought they were cheering for him and yelling words of   18  to him the entire time!
A little encouragement can go a long way. We don’t often think about the   19   that our words have upon others. Our words do have the power to hurt or to   20 .
小题1:
A.holeB.riverC.wellD.valley
小题2:
A.upB.downC.overD.around
小题3:
A.violentlyB.gentlyC.sadlyD.doubtfully
小题4:
A.wonderB.doubtC.ProblemD.way
小题5:
A.aloneB.aliveC.awareD.awake
小题6:
A.attemptedB.choseC.preferredD.failed
小题7:
A.helpingB.jumpingC.watchingD.cheering
小题8:
A.ifB.becauseC.thoughD.until
小题9:
A.savingB.spendingC.killingD.wasting
小题10:
A.ignoredB.offeredC.followedD.rejected
小题11:
A.in spite ofB.as a result ofC.in terms ofD.instead of
小题12:
A.tryB.practiseC.imagineD.quit
小题13:
A.stressB.pain C.panicD.trouble
小题14:
A.here and thereB.now and thenC.over and overD.neck and neck
小题15:
A.delightB.disappointmentC.embarrassmentD.surprise
小题16:
A.even thoughB.now thatC.as thoughD.in case
小题17:
A.blindB.deaf C.numbD.clumsy
小题18:
A.warningB.trustC.wisdomD.encouragement
小题19:
A.pressureB.magicC.effectD.force
小题20:
A.helpB.protectC.preventD.create
题型:选择题

到()世纪中叶时,报纸经营通过广告才可以获取可观的收入,商人也能够通过报纸广告把有关的销售信息在更大的空间范围扩散开来而可能获利。这种相互依存的利益促使报纸广告业务日益兴旺发达。于是就产生了以经营报纸版面为生计的“()”。

题型:选择题

两个材料相同的物体,甲的质量大于乙的质量,以相同的初动能在同一水平面上滑动,最后都静止,它们滑行的距离是(  )

A.乙大

B.甲大

C.一样大

D.无法比较

题型:选择题

关于干细胞研究和应用的伦理原则,错误的是

A.尊重胚胎的原则
B.禁止一切形式的商业活动的原则
C.不论是否用于科研,对胚胎的所有者予以保密的原则
D.安全有效的原则
E.知情同意的原则

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