金葡菌肺炎患儿突然出现呼吸困难、憋气。应首先考虑（） A.肺炎加重 B.心力衰竭 C

阅读理解。

      Mobile phones (手机) have become a problem for middle schools. Some middle

schools in Australia have banned (禁止) students from carrying mobile phones during

school hours.

      Mobile phones' use among children has become a problem for the school this year.

Several children have got mobile phones as Christmas gifts, and more students will

want them.

      Mary Bluett, an official, said mobile phones' 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 said 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 the school office. 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

mobile phones, but they think schools should let the students know when they can use

their mobile phones.

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 children

2. We know from the passage that some children get mobile phones from _____. [     ]

A. the makers and sellers

B. the passers-by and strangers

C. their parents and friends

D. some mobile phone users

3. What does the underlined word "cheat" mean in Paragraph 3?[ ]

A. 聊天

B. 核对

C. 查询

D. 作弊

4. Some parents felt unhappy because they couldn't _____ during school hours.[ ]

A. use their mobile phones

B. leave their mobile phones at the school office

C. help the teachers with their work

D. get in touch with their children

5. The passage tells us that _____. [ ]

A. students shouldn't have mobile phones at school except for some special reasons

B. it is impossible to ban students from using mobile phones at school

C. some parents felt unhappy because their children couldn't use mobile phones at school

D. parents should teach their children how to use mobile phones during school hours

在涂饰工程基层处理的要求中，木材基层的含水率不得大于( )。

A．12%

B．15%

C．18%

D．20%

分体式壁挂空调机启动运转片刻后又停机的原因有哪些？

微波致

A．白内障
B．白指
C．脑水肿
D．屈肢症
E．肺纤维化