问题 填空题

已知X和Y均是元素周期表中同一主族元素的单质,W、V是化合物,它们有如下反应:(式中各物质的化学计量数及反应条件均已略去)X+W→Y+V。

试写出符合题意且满足下列要求的化学方程式:

① W是H2O:______________________________

②V的水溶液是酸:____________________________

③W、V都是氧化物:________________________________

④V是水:_______________________________

答案

(1)2Na+2H2O=2NaOH+H2

(2)Cl2+2HBr=Br2+2HCl  (或其他合理答案)           

(3)2C+SiO2 2CO↑+ Si  

(4)O2+2H2S=2S↓+2H2O      

完形填空

I was waiting for the bus when I met the woman."You look36  Come and sit here,she  said. 37   are you going?"

"I don’ t know. I just want to catch a 38          and see what it will be like at the

end."

"I’ m afraid you’ 11 see     39   there. Why don’t you enjoy the sights on the way?"

“How can I do that while my heart’s  40  ?” I asked sadly. “My best friend had left me.”

The woman seemed to understand my feeling. "Don’ t cry, little girl. Ive had a similar experience to you.Thirty- five     41    ago, my husband left our three children and me. I was deadly sad.I decided to kill myself and the children, so I took     42    to the sea.    43they seemed to know what would happen, so they    44   loudly. Their cry suddenly woke me 45     . How could I    46  my hope to live for one of life’ s problems? Alter that,I worked hard to raise the children.Now They all live 47      and one of lthem has his own family.

Then the woman gave me a     48  ,” We should never wait for the door to 49       before us.We should find the key to the 50  or try to find another way.”

The bus came and I got on it with a smile.

小题1:A. tired           B. excited        C. happy

小题2:A. What       B. How          C. Where

小题3:A. train       B. bus           C. boat

小题4:A. nothing     B. everything     C. something

小题5:A. smiling     B. breaking       C. dancing

小题6:A. days        B. weeks         C. years

小题7:A. her         B. them         C. him 

小题8:A. So          B. Or            C. However

小题9:A. laughed     B. cried          C. spoke

小题10:A. in           B. out           C. up

小题11:A. give away    B. give up        C. get up

小题12:A. happily      B. sadly          C. badly

小题13:A. cry          B. shout         C. smile

小题14:A. open        B. close          C. lock

小题15:A. classroom   B. office          C. door

填空题