问题 选择题

据报道,2011年10月28日,我国航空生物燃料首次用于客机试飞取得成功,此次试飞中混合的生物燃料,来自麻风树结出的小桐子果实。据此完成下列各题。

小题1:目前,中石油已经在云南、四川、江西等地种植了120万亩麻风树,其种植的自然区位条件主要是

A.适宜森林种植的山地面积广

B.国家政策提倡“退耕还林”

C.热带季风气候,温暖湿润

D.土层深厚,土壤肥沃小题2:以麻风树果实为原料的生物燃料如得以推广使用,则可

A.解决气候变暖趋势

B.缓和能源供需紧张矛盾

C.完全取代矿物燃料

D.降低航空运输成本

答案

小题1:A 

小题2:B

题目分析:

小题1:2011年10月28日,我国航空生物燃料首次用于客机试飞取得成功,此次试飞中混合的生物燃料,来自麻风树结出的小桐子果实。目前,中石油已经在云南、四川、江西等地种植了120万亩麻风树,主要因为麻风树为喜光阳性植物,根系粗壮发达,具有较强的耐干旱瘠薄能力,枝、干、根近肉质,组织松软,含水分、浆汁多、有毒性而又不易燃烧,抗病虫害,生长迅速,生命力强,广泛分布于亚热带及干热河谷地区,由于该树种植可用杆插法繁殖,而且成活率高,生长速度快,头年就有收成,产量逐年增加,果实采摘可达50年。而云南、四川、江西等地适宜森林种植的山地面积广,适于麻风树的生长条件。

小题2:我国目前能源短缺,进口石油已超过日本,仅次于美国成为世界第二大原油进口国,以麻风树果实为原料的生物燃料如得以推广使用,可以缓和能源供需紧张矛盾。虽然种植了120万亩麻风树,但工厂仍在大量燃烧煤、石油、天然气等化石燃料,不可能解决气候变暖趋势。以麻风树果实为原料的生物燃料总量毕竟有限,不可能满足全国能源需求,更不可能完全取代矿物燃料。以麻风树果实为原料的生物燃料价格并不比汽油低,故不能降低航空运输成本。

阅读理解

阅读理解。

     Joe and Helen Mills had two little children. One was six and the other four. They

always resisted going to bed, and Helen was always complaining (抱怨) about this and asking Joe for help.  But as he did not come home until after they had gone to bed

during the week, he was unable to help except at weekends.

    Joe considered himself a good singer, but really his voice was not at all musical.

However, he decided that, if he sang to the children when they went to bed, it would

help them to relax, and they would soon go to sleep,

     He did this every Saturday and Sunday night until he heard his small son

whispered to his younger sister, "If you pretend that you're asleep, he stops. "  

1. The children always resisted going to bed, which          .

A. made Joe suffer a lot

B. satisfied their mother

C. Helen was not satisfied with

D. gave Helen much happiness

2.  The husband couldn't help the wife to look after the children          .      

A. because he returned from work too late every day

B. since his voice sounded like a singer's

C. except on Saturday and Sunday

D. for he did not come home until after the children had gone to bed at weekends

3. Joe worked         .

A. all the week including Saturday and Sunday

B. during the week including the weekends

C. every day but Saturday and Sunday

D. every week except on Sunday     

4. Which of the following conclusions can we draw from the above story?

A. Joe's song did help the children to relax.

B. With Joe's help, the children went to sleep.

C. The wife must be thankful to her husband for the great help.

D. The children were so tired of their father's voice that they pretended to be asleep.

5. This joke tells about          .

A. Joe and Helen

B. Helen's trouble

C. Joe's foolery

D. the bright idea of the two small children

选择题