将下列物质归类:A、液氧B、澄清石灰水C、四氧化三铁D、水银E、冰水共存物F、水

题型:填空题

问题:

将下列物质归类:A、液氧B、澄清石灰水C、四氧化三铁D、水银E、冰水共存物F、水电解后的产物G、氯化钙H、氯酸钾与二氧化锰混合加热后的剩余固体,属于混合物的是______;属于化合物的是______;属于氧化物的是______;属于单质的是______.(填序号)

考点:单质和化合物纯净物和混合物氧化物
题型:填空题

某牙膏生产厂过去一直以高质量和几倍于一般牙膏的价格开拓市场,后来他们推出“超值”牙膏,即105克装和50克装的单价分别为3.90元和2.40元,而过去135克装单价高达9.80元,“超值”牙膏非常走俏,其原因是:

A.只有当商品价值高于价格时,商品才会在市场上显示出竞争力

B.消费者总是喜爱购买价格最便宜的商品

C.超值牙膏实际上降低了销售价格

D.消费市场的状况和变化趋势对生产能顺利进行具有重大影响

题型:填空题
一根木头从长江漂流入东海海面后,它露出水面的体积和受到的浮力是(  )

A.露出水面的体积不变,受到的浮力不变

B.露出水面的体积增大,受到的浮力不变

C.露出水面的体积增大,受到的浮力减少

D.露出水面的体积不变,受到的浮力增大

题型:填空题

My Experience in a Free School

At first I couldn't believe it! There were no __26  in rows; no bells rang; no one had to go to __27  . Although we all lived “in”, __28  made us go to bed at a certain time; there was no “lights out”.

The __29 thing was that practically all the students went to class, __30  very few people stayed up late at night. Only the new people stayed up or _31 class. The new ones always went wild __32, but this never lasted long. The __33 took some getting used to. Our teachers treated us like_34; never did we have to __35 “stand up”,“sit down”,“speak out”. I don't __36 one student who didn't try his best.

The subjects were the same as those in __37school, but what a difference in the approach(方式)! For example, in botany(植物学) we had __38  classes in the spring or fall, but instead we __39 [ZZ(Z)39two gardens, a vegetable garden and a flower garden. __40 in winter we each studied a few __41  things about what we had grown. In math the students built three different kinds of storerooms small ones __42 ,but usable. They did this instead of having lessons in the classroom. They really had a __43 time too, designing everything, drawing the blueprints, __44  the angles(角度) and so on. I didn't take __45 .I can't stand it! Besides, I could do the basic things with numbers. That's __46!

__47 I think I am a __48  person for having gone to the school. I can read and write as well as anyone else my age, and I can think  better. That's probably a real big __49   between the free school and regular school—the amount of __50.

26.A. desks          B. lights        C. students         D. buildings

27.A. home           B. bed           C. class            D. work 

28.A. anybody        B. nobody        C. teachers         D. parents

29.A. sad            B. last          C. good             D. strange 

30.A. and            B. but           C. so               D. yet 

31.A. attended       B. took          C. missed           D. studied 

32.A. from then on   B. at first      C. once more        D. just then 

33.A. freedom        B. habit         C. time             D. people 

34.A. workers       B. pupils         C. gardeners        D. grownups 

35.A. understand    B. study          C. play            D. say 

36.A. hear from     B. feel like      C. think about      D. know of 

37.A. night         B. regular        C. small            D. real 

38.A. all           B. short          C. no               D. indoor 

39.A. planted       B. studied        C. drew             D. toured 

40.A. Still         B. Then           C. Yet              D. Next 

41.A. wild          B. successful     C. usual            D. particular

42.A. as well       B. after a while  C. of course        D. as a result 

43.A. funny         B. great          C. convenient       D. thoughtful

44.A. looking out   B. taking out     C. finding out      D. figuring out 

45.A. math          B. care           C. botany           D. notice 

46.A. dull          B. interesting    C. enough           D. dangerous

47.A. On the whole  B. Once again     C. Sooner or later  D. After a while 

48.A. careful       B. better         C. busier           D. lovely 

49.A. problem       B. chance         C. difference       D. change

50.A. reading       B. gardening      C. teaching         D. thinking

题型:填空题

女性,转移性右下腹痛8小时,伴恶心、呕吐,发热,体温38℃,脉搏90/min,右下腹压痛,反跳痛,肌紧张。白细胞12×109/L,尿白细胞1~2个/HP。

最可能的诊断

A.急性胰腺炎

B.急性胆囊炎

C.急性化脓性阑尾炎

D.急性肠梗阻

E.消化性溃疡穿孔

题型:填空题

杆塔组立施工方案制定中,选择作业方法时应考虑()因素。

A.实际工作对象的要求

B.有人力物力的基本情况

C.是否经济

D.现场具体情况

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