下列物质的制法,不属于化学变化的是( ) A.加热石灰石制二氧化碳 B.高温下煤

题型:选择题

问题:

下列物质的制法,不属于化学变化的是(  )

A.加热石灰石制二氧化碳

B.高温下煤炭和水蒸气制水煤气

C.液化空气制氧气

D.氢气在氯气中燃烧制氯化氢

考点:物理变化和化学变化的特征和判别
题型:选择题

排便时,肛门有灼热感是由于

A.脾虚下陷

B.瘀血

C.肝郁脾虚

D.热迫直肠

E.肝失疏泄

题型:选择题
There was a king who loved art very much. One day a(n)      came and said, "Please let me      a picture on a wall." The king happened to have a big new hall      . So he       the artist to work on one of the walls.
At the same time, another artist came and asked to work on the      wall. He promised he would make the same picture as the first artist’s       looking at the first artist’s work. The second artist asked to have a thick curtain       between the two walls       neither of them could see each other.
The following day they began to work. The first artist brought in a(n)       supply of paint, oil, water and so on. The second one came with a       and a bucket (桶).
A month later, the first artist’s work was completed, and the second artist said, "My wall is       too!"
The king went to       the first artist’s wall. He was pleased with it and gave the artist a large       of money. He then asked people to open the curtain.
      ! Each line was       the same as that on the opposite wall.
The king was quite satisfied and gave him double money. However, he       how the second man had made it.
"I just       the wall with the cloth," the man said       .The wall was made of white marble (大理石). He made it shine like a mirror. The reflection (倒影) of the first painting       up on it!
The       is a reflection of you too. If you are sad, the world will be sad. If you are happy, the world will be happy.
小题1:
A.editorB.serverC.actressD.artist
小题2:
A.putB.paintC.getD.copy
小题3:
A.builtB.createdC.destroyed D.founded
小题4:
A.allowedB.realizedC.persuadedD.Decided
小题5:
A.sameB.oppositeC.similarD.ordinary
小题6:
A.withB.withoutC.underD.upon
小题7:
A.put upB.put backC.put awayD.put on
小题8:
A.even ifB.so thatC.as ifD.in case
小题9:
A.commonB.artificialC.regularD.extra
小题10:
A.mirrorB.stickC.curtainD.cloth
小题11:
A.presentB.freeC.usefulD.ready
小题12:
A.seeB.touchC.researchD.Cover
小题13:
A.numberB.amountC.totalD.many
小题14:
A.AmazingB.ExcitingC.FamousD.Valuable
小题15:
A.probablyB.certainlyC.exactlyD.hardly
小题16:
A.knewB.noticedC.wonderedD.warned
小题17:
A.drewB.wipedC.facedD.displayed
小题18:
A.brieflyB.naturally C.safelyD.correctly
小题19:
A.setB.addedC.tookD.showed
小题20:
A.worldB.storyC.kingD.painter
题型:选择题

如图所示,质量为48kg的小华同学骑着一辆自行车在平直公路上匀速运动500m,所用时间为100s.假设自行车在行驶过程中受到的阻力为其体重的1/12.求:在这段过程中,该同学所做的功率(取g=10N/kg)

题型:选择题

中央空调设备空调主机运行检查制度有()。

A.每两小时按操作规程规定的运行检查所列项目对空调主机进行一次检查,并记录有关数据、状态

B.每周清洁机房及机组表面灰尘

C.水泵电机轴承温度是否正常运转,是否有异常声响或振动

D.压力表读数是否正常

题型:选择题

对借款人的信用分析有()

A、借款品格

B、借款人能力

C、借款人资本

D、借款人担保

E、借款人经营环境

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