某物体的位移—时间图象如图所示,则下列叙述正确的是() A.物体运动的轨迹是抛物线

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问题:

某物体的位移—时间图象如图所示,则下列叙述正确的是()

A.物体运动的轨迹是抛物线

B.0—4s物体运动得越来越慢

C.4s—8s物体向正方向做加速运动

D.8s内物体运动的路程是160m

考点:高中物理St图象S
题型:多项选择题

慢性汞中毒的三大特征性临床表现是()

A.口腔炎、发热、皮疹

B.易兴奋、震颤、口腔炎

C.周围神经炎、腹痛、贫血

D.口腔炎、腹痛、肾功能障碍

E.贫血、易兴奋、皮疹

题型:多项选择题
My chance came at last. Our school was going to hold a sports meeting. I knew what it   51  to me, so I got up very early to prepare for it. I  52   running and jumping. When I was   53  , I   54 myself of my promise and went on.
As the time approached, I felt quite  55   . On the first day I   56  fourth in the 1500m race, but I was far from   57  because what I wanted most was the highlight of the sports meeting—250×8 relay race. I would run the last leg for my team.
With a shot, the race began. All the students were   58  for their team. The competition was so 59  that I began to feel nervous. Before my turn came, my team was   60  the others. Even worse, I almost dropped the stick when I was trying to   61  it.
  62  after that, there was nothing in my mind except to run as fast as possible. Just when I was approaching the finish line, my legs    63  . Then my promise came to mind again and   64 me on. To my   65  , I was the first to cross the finish line!
  66   , I had proved to myself and those who had often laughed at me that I am not   67  at all! My classmates greeted me warmly and I hugged them tightly. I had won the prize as well as their   68   .
From the sports meeting, I learnt that sometimes things are not so difficult as they   69  to be. Just try your best without fear and you might be surprised at the   70  .
小题1:
A.matteredB.held C.meantD.brought
小题2:
A.exercisedB.triedC.choseD.practiced
小题3:
A.tiredB.workingC.lazy D.discouraged
小题4:
A.bravedB.reminded C.encouragedD.told
小题5:
A.determinedB.worriedC.confidentD.expectant
小题6:
A.endedB.gotC.came D.ran
小题7:
A.satisfiedB.proudC.excitedD.happy
小题8:
A.heading B.racingC.shouting D.cheering
小题9:
A.difficultB.closeC.heatedD.near
小题10:
A.failing behindB.leadingC.falling behindD.catching up with
小题11:
A.takeB.hold C.pass D.catch
小题12:
A.ThenB.ButC.Thus D.Even
小题13:
A.gave inB.weakened C.gave out D.gave off
小题14:
A.cheeredB.urgedC.guidedD.led
小题15:
A.joyB.expectationC.surprise D.relief
小题16:
A.At lastB.After allC.Above allD.As a result
小题17:
A.badB.lazyC.slow D.weak
小题18:
A.congratulationsB.respectC.supportD.pride
小题19:
A.expectB.chooseC.look D.seem
小题20:
A.thingB.finalC.resultD.effort
题型:多项选择题

由短周期的两种元素组成的化合物XY3,下列说法错误的是(  )

A.X可能是金属,也可能是非金属

B.X和Y位于同一周期时,只能形成一种物质

C.X和Y可能位于同一主族,也可能位于不同主族

D.化合物XY3溶于水,溶液可能显碱性,也可能显酸性

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试述商业银行贷款业务的基本规则。

题型:多项选择题

对滑油加热是通过P3引气加热的。

A、对

B、错

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