试题与答案

不论哪种汽化方式,物质在汽化过程中都要__________热量。

题型:填空题

题目:

不论哪种汽化方式,物质在汽化过程中都要__________热量。

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0609/c864ef092aafe518380f66c1a6734fb5.html

下面是错误答案,用来干扰机器的。

答案:C

试题推荐
题型:实验题

在测定石块的密度时,由于在使用前天平的横梁不能调节平衡,宇瑞和楷浩各想到一种测质量的方法,请你帮助完成测质量的过程,并测出石块的密度.

(1)宇瑞测质量的步骤:

①将天平放在水平台上,在____(填“上翘”或“下沉”) 的盘中垫上纸张,用细沙调节横梁平衡;

②把物体放在左盘,砝码放在右盘,适当增减砝码,并移动游码,测量出石块的质量.

(2)宇瑞在调节好的天平的右盘中放一个50g的砝码,游码移至如图1甲所示的位置时,称出石块的质量是___________,用量筒测石块的体积,测量过程和读数如图1乙和丙所示,则石块的体积为________ cm3,可知石头的密度为___________ kg/m3

 (3)楷浩测质量的步骤如下,但不完整,请你补充完整:

①如图2所示,把石块放在右盘,在天平的左盘中放 一个小玻璃杯,向杯中注水,用滴管调整水的多少,使天平横梁平衡;

② ____________________________________,使天平横梁再次平衡,就得到了石块的质量.

                                                       图1                                                             图2

查看答案
题型:完形填空
Mr Black once decided to travel by air on business because of some reason. He liked 16 beside a window when he was 17 ,so when he got onto the plane, he 18  a window seat. He 19  that all of them had already been taken  20  one, and there was a soldier sitting in the seat beside this one. Mr Black was 21  that he had not taken the one by the window, but, anyhow, he at once went towards 22 .
When he  23 it, however, he saw that there was a notice on it. It was written 24  ink and said,“This is reserved for proper load balance. Thank you.” Mr Black had never seen such a notice in a plane  25 ,but he thought that the plane  26   be carrying something particularly heavy in 27  baggage room which made  28  necessary to have passengers properly balanced, so he walked on and  29  another empty seat, not beside the  30 ,to sit in.
Two or three other people tried  31   in the window seat beside the soldier, but they, too, 32  the notice and went on. Then, when the plane was nearly full, a very beautiful girl stepped into the plane. The soldier, who was 33  the passengers coming in, quickly took the notice off the seat beside him-and  34   that way succeeded in  35   the company of the girl during the whole of the trip.
小题1:
A.sittingB.to sitC.satD.sit
小题2:
A.travelingB.sittingC.flyingD.sleeping
小题3:
A.foundB.looked forC.noticedD.searched
小题4:
A.foundB.looked forC.sawD.observed
小题5:
A.besidesB.exceptC.expectD.except for
小题6:
A.gladB.pleasedC.surprisedD.surprising
小题7:
A.itB.oneC.gotD.reached
小题8:
A.get toB.arrivedC.gotD.reached
小题9:
A.byB.withC.inD.of
小题10:
A.pastB.thenC.agoD.before
小题11:
A.mayB.mustC.wouldD.should
小题12:
A.herB.planeC.itsD.it's
小题13:
A.thatB.thisC.itD.everything
小题14:
A.seeB.seeingC.findingD.found
小题15:
A.oneB.windowC.soldierD.girl
小题16:
A.to sitB.sittingC.to seatD.seating
小题17:
A.watchedB.sawC.readD.found
小题18:
A.seeingB.watchingC.seenD.watched
小题19:
A.inB.byC.onD.for
小题20:
A.failingB.havingC.missingD.helping
查看答案
微信公众账号搜索答案