下列有关氧化还原反应的叙述中,正确的是 A.一定有氧元素参加 B.氧化剂本身发生

题型:选择题

问题:

下列有关氧化还原反应的叙述中,正确的是

A.一定有氧元素参加

B.氧化剂本身发生氧化反应

C.氧化反应先于还原反应

D.一定有电子转移(得失或偏移)

考点:质量守恒定律阿伏加德罗定律晶体、非晶体
题型:选择题
完形填空 阅读短文,从每题所给选项中选出可以入空白处的最佳选项。(15分)
Last week Lu visited England. He stayed with my grandmother. He said it was a strange visit. “I don’t understand, but I  16 your grandmother a lot. When I arrived, I gave her a   17 from Suzhou. She looked in it and asked me to take it back. Then I saw a red spider(蜘蛛) on the table so I killed it for her and she seemed very   18 . Do English people like spiders?”
“Later we went shopping. Someone was painting a shop   19 , so there was a ladder. Grandmother  20 me walking under it and said I must walk around it. I liked the shops and bought a smart   21 for my father and some new shoes for myself. When we got back, I put the shoes on the table and opened the umbrella to wonder   22 it was all right. Your grandmother came in and   23 !”
“Then I broke a small   24 in the bathroom. Your grandmother’s face went white. I felt very sorry. When I left I gave   25 grandmother some flowers. She counted and there were 13. She   26 it. I think she was happy I was going.”
I   27 to Lu, “My grandmother follows the old customs(习俗). You must not give someone an empty purse   28 they will have no money. You must not kill a “money spider” or the same will happen. It is very unlucky to walk under a ladder and to put new shoes on the table. A(n)  29 umbrella in a house means someone will die. Breaking a mirror brings seven years’ bad luck, and 13 is   30 a very unlucky number. You were really making my grandmother very afraid. ”
小题1:
A.affectedB.lovedC.frightenedD.encouraged
小题2:
A.penB.purseC.dressD.handbag
小题3:
A.honestB.humorousC.happy D.unhappy
小题4:
A.backB.rightC.frontD.left
小题5:
A.stoppedB.keptC.insistedD.suggested
小题6:
A.walletB.umbrellaC.flowerD.shirt
小题7:
A.whyB.thatC.ifD.where
小题8:
A.laughedB.screamedC.clappedD.cheered
小题9:
A.bowlB.bottleC.plateD.mirror
小题10:
A.myB.yourC.herD.our
小题11:
A.didn’t likeB.likedC.enjoyedD.smelt
小题12:
A.shoutedB.talkedC.toldD.explained
小题13:
A.butB.forC.orD.so
小题14: A open    B. closed   C. new  D. old
小题15:
A.hardlyB.neverC.seldomD.also
题型:选择题

关于如图所示四幅图片的说法中,正确的是(  )

A.图片A所示的实验表明,真空不能传声

B.图片B所示的实验表明,频率越高,音调越低

C.图片C所示的实验表明,噪声可以在人耳处减弱

D.图片D中的蝙蝠利用发出的电磁波导航

题型:选择题

直接作用于体温调节中枢引起发热的是()。

A.病原体产生的外源性致热原

B.病原体产生的内源性致热原

C.血液中的白细胞产生的外源性致热原

D.血液中的白细胞产生的内源性致热原

E.血液中的白细胞及病原体产生的代谢产物

题型:选择题

J.Martin认为结构化设计和分析来提高数据处理生产率的做法收效甚微,因为哪些因素影响其效果  Ⅰ.应用的微小变化,可能导致程序的系列变化  Ⅱ.数据格式的不一致,导致数据共享性差  Ⅲ.没用高级数据库语言,没有良好的数据库设计  Ⅳ.企业的应用程序中存在着许多重复的逻辑结构

A.Ⅰ和Ⅳ

B.全部

C.Ⅱ和Ⅲ

D.Ⅲ

题型:选择题

线性表采用链式存储时,其地址 ______。

A.必须是连续的

B.部分地址必须是连续的

C.一定是不连续的

D.连续与否均可以

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