题干

非洲是世界上经济发展水平最低的大洲,人口自然增长率高,受气候影响干旱区面积广大,加之农业生产技术落后,粮食的增长速度远低于人口的增长速度,很多国家地区粮食依然不能自给,非洲人民经常陷于饥饿的状态.下面就你的理解,把影响非洲发展的三大主要问题填入图中方框内.

填入选项:人口问题;粮食问题;环境问题

上一题 下一题 0.0难度 选择题 更新时间:2017-11-27 09:41:29

答案(点此获取答案解析)

同类题1

阅读理解

I'm David.When I was 13,my parents decided that I should go to England to improve my English.I had never been to other countries before,so I felt a little worried.My parents prepared everything for my journey.My plane was due(预期)to leave at 9:30 a.m.and arrive in two hours.I phoned the English family who I would stay with and they told me they would wait for me at the airport(机场).

Unluckily my plane to London was delayed (延误).I tried to phone the English family again but I couldn't speak to them because they had already left home for the airport.

When I arrived in London.it was already 1:30p.m.I went to get my luggage(行李)but I couldn't find it.I became very worried.Luckily, the airport staff(工作人员)was very helpful and efficient.I didn't wait long-they found it 10 minutes later.

My English family were still waiting for me! I was so happy! Then my new life in London began.My English family were quite kind.I learned a lot of English because I spent most of the day talking in English.I played computer games with the little boy in my English family.I also taught him how to play chess.Sometimes I told him stories I learned from my family.

I missed my family during my stay in London.but I also feIt sad when my stay there came to an end.My English family held a party for me.I enjoyed it very much.I’ll never forget that summer in London! It is one of the most wonderful experiences I've ever had.