问题 单项选择题

为估算湖中鲤鱼的数量,某人撒网捕到鲤鱼300条,并对这300条鱼作了标记后又放回湖中,过了一段时间,他又撒网一次捕到鲤鱼200条,发现其中鲤鱼有5条有标记,由此他估算湖中鲤鱼的数量约为( )。

A.1200条
B.12000条
C.30000条
D.300000条

答案

参考答案:B

解析: 根据比例相同可得[*],则总量为12000条,故选B。

完形填空

阅读下列各小题,根据括号内的汉语提示,用句末内的英语单词完成句子,并将答案写在答题卡上的相应题号后。

例:We __________________  (起床) before dawn. It was still dark outside.  (get)

答案:got up

小题1: Having made careful enquiry and study, John came to the final conclusion that_______________ (水是罪魁祸首).    (blame)

小题2:The earthquake and the tsunami that followed lasted for days, _____________________ (使得许多人无家可归).    (leave)

小题3: It’s generally considered a posture of defense when people talk to a stranger with___________________ (双臂交叉).  (cross)

小题4: He is very tall among others and always wears bushy beard. You will recognize him_________________ (你一见到他).  (instant)

小题5:-- What has become of Henry? I haven’t seen him for days!

--- He___________________(折断了腿)in the football final and is now staying in hospital.  (have)

小题6:_________________________(只有靠适应变化) that we can keep up with the lightning pace of the modern world.  (adjust)

小题7: I have been a shop assistant since I finished school. _____________________ (有时) I wonder why I have to do this job.  (time)

小题8:The charming cottage, _________________________(追溯到罗马时代), is as pretty as a picture.  (date)

小题9:__________________________________(厌倦了城市生活), she made up her mind to move to the countryside and settle down there for a quieter life.  (feed)

小题10:-- Hey, man. You are parked on a double yellow line!

--- Sorry, officer. _____________________(我在想) where I could park and didn’t notice it.   (wonder)

单项选择题