问题 多项选择题

下述哪项描述是正确的( )

A.解毒作用是机体防御功能的重要组成部分

B.动物的种属、年龄、性别、营养状态及遗传特性对生物转化的性质与强度均有重大影响

C.经过体内的生物转化,所有化学毒物的毒性均降低

D.前致癌物可通过生物转化后变成终致癌物

答案

参考答案:A,B,D

解析: 经体内的生物转化,有些物质毒性反而会增强。

听力题

第一节:单词拼写与短语 (必须用课文原词)(共20小题; 每小题0.5分,共10分)

小题1:Many European ____________(探险者)went to the continent of Africa in the 19th century.

小题2:The villagers ____________(使陷入困境) in the flood waited for the rescue.

小题3:The ____________(航行) from England to India used to take six months.

小题4:Computers are becoming lighter, smaller and more ___________(便携的).

小题5:The government is taking ____________(试探性的) steps towards dealing with the country’s economic problems.

小题6:Reports of this kind have been ____________ (传播) by our newspaper quickly.

小题7:As soon as the Polynesian guest tasted the asparagus he ____________ (评论) how delicious it was!

小题8:In Australia, each person consumed about 39 kilograms of meat a year during the 1980s and the ____________ (结果) was that many people were overweight.

小题9:Parts of the cave have been badly affected by rain and ____________ (暴露) to the air.

小题10:Since most Antarctic rocks are dark in colour, they stand out against the white background and are easy to ____________(识别) and collect.

小题11: 进入,踏上______________________

小题12: 把.. …抛在后面______________________

小题13:自由地______________________

小题14:直线去某地______________________

小题15:与…关系密切______________________

小题16:难怪______________________

小题17:厌倦做某事______________________

小题18:与…有共同点______________________

小题19:放火烧______________________

小题20: 受…支配______________________

单项选择题