学完了“平面直角坐标系”后,贝贝同学在笔记本上写了下列一些体会。 ①如果一个点的

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问题:

学完了“平面直角坐标系”后,贝贝同学在笔记本上写了下列一些体会。 

①如果一个点的横、纵坐标都为零,则这个点是原点; 

②如果一个点在坐标轴上,那么它一定不属于任何象限; 

③纵轴上的点的横坐标均相等,且都等于零;  

④纵坐标相同的点,分布在平行于y轴的某条直线上,  

其中你认为正确的有              .(把正确的序号填在横线上)

考点:用坐标表示位置
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Have you ever complained why life is so tiring? Does the sky sometimes seem dark to you? Are your lessons sometimes not successful? Well, friends, cheer up and   15  all the time. If you see the world with your warm heart, you’ll   16  the whole world smiling to you.
On a sunny morning, you plan to have a walk   17  yourself. Just before you go out, it suddenly starts to rain. Maybe you would feel very sad and start to complain about the weather. But dear friends, why   18  sit down and listen to the free concert that the nature brings you? And with the timely rain, crops(庄稼)in the fields will grow better and farmers will have a good harvest(收成).
Everyone wants to succeed in what he tries to do,    19  life isn’t a bed of roses. It’s very common to meet difficulties on the way    20   success. In fact, difficulty isn’t terrible. The real terrible thing is that we are afraid of it. Difficulty is like spring(弹簧). If you are   21 , it will be strong. Attitude(态度) decides   22 . With an optimistic (乐观的) attitude, life is easy and   23 . So when you meet difficulties, don’t give up. Instead, you should face them with a smile. Remember these five rules: Free your heart from hate; Free your mind from worries; Live an easy life; Give more; Expect   24 .
小题1:
A.happyB.unhappyC.smileD.cry
小题2:
A.lookB.look forC.findD.find out
小题3:
A.enjoyingB.to relaxC.relaxD.enjoy
小题4:
A.don’tB.didn’tC.haven’tD.not
小题5:
A.butB.andC.orD.so
小题6:
A.ofB.toC.aboutD.for
小题7:
A.energeticB.powerfulC.confidentD.weak
小题8:
A.anythingB.somethingC.everythingD.nothing
小题9:
A.pleaseB.pleasureC.pleasedD.pleasant
小题10:
A.littleB.fewC.lessD.fewer
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钝化夜为无色透明、酸性、不燃不爆、腐蚀性液体。

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在施工地段,非施工机动车()。

A.不得停车

B.可以随意停车

C.可以长时间停车

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先天性主动脉瓣狭窄的最常见病因是()

A.感染性心内膜炎

B.先天性二叶瓣畸形

C.心肌缺血

D.二尖瓣环退行性变

E.风湿性损害

题型:填空题

容积式水泵对液体的压送是靠水泵内部工作室容积变化来完成的。

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