问题 选择题

“海南毒豇豆”中含水胺硫磷(C11H16NO4PS)是一种速效广谱硫逐式一硫代磷酰胺类杀虫、杀螨剂.水胺硫磷能通过食道、皮肤和呼吸道引起中毒.下列有关水胺硫磷说法正确的是(  )

A.水胺硫磷属于无机化合物

B.水胺硫磷中各元素的质量比为11:16:1:4:1:1

C.一个水胺硫磷分子中含有两个氧分子

D.水胺硫磷由6种元素组成

答案

A、根据含有碳元素的化合物叫有机化合物,简称有机物.碳的氧化物、碳酸盐、碳酸虽含碳,但其性质与无机物类似,因此把它们看作无机物.进行判断,水胺硫磷属于机化合物;故A说法错误;

B、根据标在元素符号右下角的数字表示一个分子中所含原子的个数;可知水胺硫磷中各元素的原子个数比

为 11:16:1:4:1:1;故B说法错误;

C、根据标在元素符号右下角的数字表示一个分子中所含原子的个数;可知一个水胺硫磷分子中含有4个氧分子原子;故C说法错误;

D、根据水胺硫磷的化学式(C11H16NO4PS)分析可知其由C,H,N,O,P,S 6种元素组成;股D十分正确.

故选D.

阅读理解

Alan worked in an office in the city. He worked very hard and really looked forward to his holiday. He usually went to the seaside, but one year he saw an ad. in a newspaper “Enjoy country life. Spend a few weeks at William Farm. Good food, fresh air, horse riding, walking, fishing…”

“This sounds like a good idea.”he thought, I’ll spend a month at William Farm. I’ll go horse riding, walking and fishing. It’ll be different from the seaside.” Four days later, he returned home.

“What’s wrong with William Farm?”His friend Jack asked him.“Didn’t you enjoy country life?”

“Country life was fine,”Alan said.“But there was another problem.”

“Oh, what problem?”

“Well, the first day I was there, a sheep died, and we had roast(烤肉) mutton for dinner.”

“Fresh meat is the best.”

“I know, but on the second day a cow died, and we had roast beef for dinner.”

“Lucky you!”

“You don’t understand,”Alan said,“On the third day a pig died and we had roast pork for dinner.”

“A different roast every day.”Jack said.

“Let me finish.”Alan said,“On the fourth day a farmer died and I didn’t want to stay there for dinner.”

小题1:Alan saw ________ in a news paper.

A.an ad.

B.a letter

C.a story

D.a report小题2:Alan usually went to ________ on the vacation.

A.the mountains

B.the countryside

C.the seaside

D.William Farm小题3:Alan spent _________ at William Farm.

A.four days

B.three months

C.a month

D.a few weeks小题4:Alan had roast _______ for dinner on the third day.

A.mutton

B.pork

C.beef

D.fish小题5: From the passage we know that ________.

A.Alan left the farm because he missed his family

B.Alan left the farm because he had four dinners at the farm

C.Alan left the farm because he couldn’t go fishing at the farm

D.Alan came back home because he was afraid of the fourth dinner

填空题