问题 填空题

根据物质组成种类的多少可以把物质分为纯净物和混合物;而根据纯净物中组成元素的多少又可以分成单质和化合物.现有以下物质:(1)氢气(H2);(2)牛奶;(3)澄清的石灰水;(4)氧化铝(Al2O3);(5)水(H2O);(6)四氧化三铁(Fe3O4);(7)白磷(P);(8)高锰酸钾(KMnO4);(9)二氧化硫(SO2);(10)氯化钠(NaCl);(11)过氧化氢(H2O2).其中:

属于混合物的有(填序号,下同)______;

属于化合物的有______,它们的共同特点是______;

属于单质的是______,它们的共同特点是______;

可以将______称做氧化物,它们在组成上的共同特点是______.

答案

(2)牛奶(3)澄清的石灰水是由多种物质组成的物质,属于混合物,(4)氧化铝、(5)水、(6)四氧化三铁、(8)高锰酸钾、(9)二氧化硫、(10)氯化钠、(11)过氧化氢是由不同种元素组成的纯净物,属于化合物,(1)氢气、(7)白磷是由一种元素组成的纯净物,属于单质,(4)氧化铝、(5)水、(6)四氧化三铁、(9)二氧化硫、(11)过氧化氢是由两种元素组成,其中一种是氧元素的化合物,属于氧化物,故填:(2)(3);(4)(5)(6)(8)(9)(10)(11),由不同种元素组成的纯净物;(1)(7),由一种元素组成的纯净物;(4)(5)(6)(9)(11),由两种元素组成,其中一种是氧元素的化合物.

选择题
完形填空
My two-year-old daughter Kate wanted a dog. But I was too busy to buy one. One day, Kate ran in, shouting, “Mom! Come to see my dog!” Her face was red with __36__.
I followed her to the bush and found a __37__! He was hurt. Seeing me, he stood up __38__!
I could see his teeth! God! My mouth felt __39__. “Don’t be afraid. That’s mom. She loves you, too.” Kate said. Then he became friendly. It was __40__!
I __41__to find my husband and told him about the wolf. We should have killed the wolf, __42__Kate loved him. Besides, he was gentle to Kate. So we called the vet(兽医)finally.
Kate named the wolf Ralph __43__ she carried food to him every day. Later, Ralph got well. They played together in the daytime. At night, Ralph would return to the mountains. Sometimes he __44__but came back several days later.
On Kate’s first day of school, we could see Ralph’s __45__. After the school bus left, Ralph lay by the side of the road and __46__. When Kate returned, he got happy again. This __47__throughout Kate’s school years.
Twelve __48__passed.
One day we heard that a she-wolf was killed. The other wolf was hurt and ran away. We were__49__about Ralph. That night, Ralph returned with a wound(伤口). Sixteen-year-old Kate held his head and __50__him. We hope he could come through. However, he __51__.
Kate cried. I noticed something strange in the bush-----two little yellow eyes! Ralph’s __52__! Before he died, Ralph __53__his child to us ! He knew he would be __54__here, as he had been. Ralph, Ralph... I was __50__.
“Don’t be afraid, little...Ralphie. That’s mom. She loves you, too.”
小题1:
A.encouragementB.entertainmentC.excitementD.agreement
小题2:
A.dogB.foxC.wolfD.tiger
小题3:
A.suddenlyB.finallyC.slowlyD.patiently
小题4:
A.hurtB.dryC.warmlyD.cold
小题5:
A.wonderfulB.unhappyC.unbelievableD.normal
小题6:
A.preparedB.rushedC.pretendedD.wanted
小题7:
A.howeverB.soC.thoughD.but
小题8:
A.andB.butC.soD.or
小题9:
A.disappearedB.turnedC.passedD.came
小题10:
A.sadnessB.dreamC.understandingD.anger
小题11:
A.sleptB.leftC.sangD.waited
小题12:
A.stoppedB.joinedC.livedD.continued
小题13:
A.yearsB.weeksC.monthsD.days
小题14:
A.surprisedB.hopefulC.worriedD.careful
小题15:
A.comfortedB.beatC.washedD.struck
小题16:
A.succeededB.diedC.criedD.woke
小题17:
A.motherB.fatherC.childD.wife
小题18:
A.postedB.broughtC.gaveD.threw
小题19:
A.happilyB.safeC.warmD.friendly
小题20:
A.confusedB.frightenedC.disappointedD.moved