问题 填空题

造成生物多样性丧失的原因主要有______和______.

答案

威胁生物生存的原因有栖息地被破坏、偷猎、外来物种入侵、环境污染、其他原因等.栖息地被破坏如人类的乱砍滥伐、不合理的垦荒种田、围湖造田、过度放牧等,偷猎是人为因素对动物的猎取,人口快速增长是破坏或改变野生动物栖息地和过度利用生物资源的最主要的原因.环境污染会影响生物的生存,尤其是水污染对水生生物的危害更大,严重是会使水生生物灭绝.

故答案为:人口的快速增长;环境污染.

阅读理解

Sydney Australia—Mobile phone has become a problem for middle schools. Some middle schools in Australia have banned students from carrying mobile phones during school hours.

Mobile phone use among children has become a problem for the school this year. Several children have got mobile phones as Christmas gifts, and more students want them.

Mary Bluett, an official, said mobile phone use is a distraction(分心的事)to students during school hours and it also gives teachers so much trouble in their classrooms. Teachers were also saying that sometimes students might use phone messages to cheat during exams.

She said some schools had tried to ban mobile phones. Some parents felt unhappy because they couldn’t get in touch with their children.

Many teachers said students should not have mobile phones at school, but if there was a good reason, they could leave their phones at school offices. They also said there were many reasons why the students should not have mobile phones at school: they were easy to lose and were a distraction from studies.

Many people say that they understand why parents would want their children to have phones, but they think schools should let the students know when they can use their mobile phones.

小题1:Some middle schools in Australia have banned students from carrying mobile phones________.

A.because they are students

B.when they are free

C.when they are at school

D.because they are young小题2:We know from the passage that some children get mobile phones from________.

A.the makers and sellers

B.some other strangers

C.their parents and friends

D.some mobile phone users小题3:Some parents felt unhappy because they couldn’t _______ during school hours.

A.use their mobile phones

B.leave their mobile phones

C.help the teachers with their work

D.get in touch with their children小题4:The underlined word “they” in the fifth paragraph refers to________.

A.many teachers

B.some messages

C.mobile phones

D.some students

多选题