问题 实验题

(9分)米饭是我们每天都要摄入的主食,是由水稻所结的谷子碾出的大米煮成的。

(1)水稻种子外面有         包被,所以水稻属于被子植物。

(2)世界上首位经过多年艰辛实验研究培育出高产杂交水稻的科学家是从我市安江农校走出,被誉为“杂交水稻之父”的          ,他用野生水稻与普通栽培水稻多次杂交,培育出产量很高的杂交稻新品种,这是利用生物多样性中的       多样性。

(3)水稻在海南岛一年可以种植三季,而在大陆其它地方只能种植二季或一季,影响这种现象的环境因素是            

(4)大米的主要营养成为是              ,这种有机物是水稻叶肉细胞通过        作用合成的。这一作用是绿色植物一种十分重要的生理作用,该作用不但为生物圈中所有生物提供了基本的食物来源,而且提供了呼吸作用需要的           ,同时减少了大气中的         含量,维持了生物圈中的碳—氧平衡。

(5)王大爷不小心把几粒稻种混在黄豆中播种到地里,这些稻种长出的水稻因缺水缺肥长得非常矮小,这种矮小的性状能不能遗传给下一代?             。(填“能”或“不能”)

答案

(1)果皮 (2)袁隆平   遗传(或基因)(3)气温 (4)淀粉 光合   氧气 二氧化碳  (5)不能

水稻属于被子植物,被子植物的种子外面有果皮包被;被称为“杂交水稻之父”的是袁隆平,杂交水稻的培育利用了基因的多样性;海南的温度高,所以水稻可以一年种植三次;大米中主要含淀粉,淀粉是光合作用合成的,光合作用的产物是淀粉和氧气,原料是二氧化碳和水,所以绿色植物能够维持生物圈中的碳—氧平衡;水稻产生的这种矮小的性状是由于环境条件改变,而遗传物质没有改变产生的变异,不会遗传给后代。

阅读理解

Smog(雾霾) is a kind of air pollution. It makes the sky look grey and dirty, and its air pollutants(污染物) come from many kinds of natural and manmade sources.

Smog is a big problem for our daily life. In smog weather, many people choose to wear masks (口罩) when they go out. And just because of smog weather, many traffic accidents have happened,many flights are stopped, a lot of people have to stay at home because they think the air is dangerous, and more people with different diseases have to go to see the doctor.

People now see the great danger of the smog and the importance of caring the environment. People all over the country are taking actions. First of all, the laws (法律) must be carried out(执行) strictly. Secondly, it will be better for people to go to work or school with public traffic, such as the bus and subway, instead of the car. What’s more, we should plant more trees.

小题1:What is smog?

A. A kind of water pollution.    B. A kind of noise pollution.     C. A kind of air pollution.

小题2:In smog weather, what do many people choose to wear?

A. Masks.                B. Sweaters.          C. Jackets.

小题3:In smog weather, what may happen?

A. There are more people exercising in the park.

B. There are more traffic accidents on the road.

C. Nobody goes to the hospital.

小题4:What can we do to do with smog?

A. Try not to use public traffic.

B. Carry out the laws strictly.

C. Plant fewer trees.

小题5:According to the passage, which of the following is NOT true?

A. Smog makes the sky look terrible.

B. It tells us two ways to protect environment.

C. Taking public traffic is good for the environment. 

单项选择题 B1型题