0  347233  347241  347247  347251  347257  347259  347263  347269  347271  347277  347283  347287  347289  347293  347299  347301  347307  347311  347313  347317  347319  347323  347325  347327  347328  347329  347331  347332  347333  347335  347337  347341  347343  347347  347349  347353  347359  347361  347367  347371  347373  347377  347383  347389  347391  347397  347401  347403  347409  347413  347419  347427  447090 

7. A poet and artist coming to speak to us about Chinese literature and paintings tomorrow afternoon.

A. is                       B. are                       C. was                D. were

试题详情

6.-Mike, what did our monitor say just now?

-Every boy and every girl as well as teachers who    to visit the museum asked to be at the school gate before 6:30 in the morning.

A. is; is                    B. are; is                    C. is; are              D. are; are

试题详情

5. Tom as well as two of his friends ________ to the concert last night A. has been invited                                     B. had been invited 

C. were invited                                        D. was invited

试题详情

4. A variety of books  _____________ the children of different ages.

A. are interested in                                    B. is interested in

C. are intending for                                    D. is intending for

试题详情

3. This special strain of rice ___________ one-third more of the crop in the same field.

A. makes possible to produce                           B. makes it possible to produce

C. make possible producing D. make it possible producing

试题详情

2. The rich_____ not always happy. .  

A. is                       B. are                       C. has                 D. have

试题详情

1. The teacher, with 6 girls and 8 boys of her class, _______ visiting a museum when the earthquake struck.  

A. was                    B. were                     C. had been           D. would be

试题详情

30.(11分)

通过粮食发酵可获得某含氧有机化合物X,其相对分子质量为46,其中碳的质量分数为52.2%,氢的质量分数为13.0%。

(1)X的分子式是________________;

(2)X与金属钠反应放出氢气,反应的化学方程式是              

 (有机物用结构简式表达);

(3)X与空气中的氧气在铜或银催化下反应生成Y,所发生反应的化学方程式为          ,Y中所含官能团的名称为 _______

福州八中2009-2010学年第二学期期末考试

试题详情

29.(24分)

X、Y、Z、W、Q是原子序数依次增大的短周期主族元素,X、W在周期表中的相对位置如下表;X元素最低负化合价的绝对值与其原子最外层电子数相等;Z是地壳中含量最多的金属元素

(1)元素Q在周期表中位于第_____族,Z的离子结构示意图为_____

(2)Z、W、Q的原子半径由大到小的顺序为           。(用元素符号表示其原子 )。

 (3)X和氢组成的化合物分子中有6个原子,其结构简式为______,写出该物质与水加成的化学方程式          。 

(4)Y的最简单气态氢化物甲的水溶液显碱性

  ①用电离方程式表示氢化物甲的水溶液中的显碱性的原因     

 ②在微电子工业中,甲的水溶液可作刻蚀剂H2O2 的清除剂,所发生反应的产物不污染环境,其化学方程式为____         __。该反应的氧化剂是      

当有1mol甲参加反应时,电子转移     mol。

 ③Y的最简单气态氢化物甲和Q的氢化物乙反应生成正盐的电子式    , 

该化合物中所含化学键类型是       ,该化合物属于      晶体。

试题详情

28.将W1 g光亮的铜丝在空气中加热一段时间后,迅速插入下列物质中,取出干燥,如此反复几次,最后取出铜丝用蒸馏水洗涤、干燥、称得其质量为W2  g。实验时由于所插入的物质不同,铜丝的前后质量变化可能不同,下列所插物质与铜丝的质量关系不正确的是

A.石灰水W1 <W2          B.CO  W1 = W2 

C.NaHSO4 W1 >W2          D.乙醇溶液 W1 <W2

试题详情


同步练习册答案