题干

如图甲,一束激光AO由空气斜射入玻璃砖,折射后从另一侧面射出,其出射点可能是图中的____点.图乙是小磊同学看远处物体时的光路图,由图可知他是____(近视/远视)眼,如需矫正视力,他应选用的镜片是____(凹/凸)透镜.如图丙所示,志刚同学透过装水的杯子观察铅笔.手中铅笔的笔尖本是朝左的,可他看到的像却是笔尖朝右,志刚同学看到的是铅笔的____(实/虚)像,若将铅笔继续____(靠近/远离)烧杯,他所看到的像将会变成笔尖朝左.

上一题 下一题 0.0难度 选择题 更新时间:2015-03-31 04:58:47

答案(点此获取答案解析)

N,近视,凹,实,靠近

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.