对ACEI描述错误的是A．适用于各型高血压 B．降压同时无反射性心率加快 C．长期应

阅读短文，选择正确答案。

    It's the lunchtime break at Shanghai Xianxia Middle School. No mobile phones can be heard ringing anywhere.

The common sight of crowds of children chatting on their phones or sending short messages has disappeared.

    A grade — 2 student said, "I couldn't concentrate during classes if the cell phone was with me. I couldn't help

checking if there were messages or missed phone calls. I even played games on the phone sometimes." 　　

    The school authorities say they feel the ban is necessary to keep order in class. They even gave out an open

letter to remind parents not to let their children bring mobile phones to school. More than 96 percent of parents

say they welcome the school decision. The school is also being flexible (灵活的) in implementing the ban. Those

students who live far from school are allowed to bring mobile phones to contact their parents. But they still have

to switch them off in classrooms.

    Medical experts have also welcomed the school decision. They say too much dependence on mobile phones

can cause many psychological problems in teenage students.

1. The grade--2 student thought that _______. [ ]

A. the mobile phone should be on during classes

B. it is good to play cell phone games sometimes

C. the mobile phone is helpful to her studies

D. it is no good to use the cell phone at school

2. According to the passage, the students use their mobile phones except _______. [ ]

A. contacting their parents

B. cheating in exams

C. sending short messages

D. playing games

3. Which of the following is TRUE according to the passage? [ ]

A. All the parents welcome the school decision.

B. Some students can bring mobile phones to school.

C. Medical experts are against the school decision.

D. No one is allowed to bring his mobile phone to school.

4. What does the underlined word "implementing" in paragraph 3 probably mean? [ ]

A. Carrying out.

B. Giving up.

C. Making up.

D. Finding out.

5. The passage mainly tells us               . [ ]

A. the mobile phone is a big trouble to teenage students

B. the use of the mobile phone can cause mental problems

C. about a ban on the mobile phone in a middle school

D. a story happening at Shanghai Xianxia Middle School

成为抗击日本侵略的中流砥柱是： [ ]

A．国民政府

B．中共领导的根据地军民

C．海外华侨

D．国际反法西斯同盟国

（9分）按要求书写化学反应符号表达式：

① 有水参加的分解反应                                 ；

② 有水生成的分解反应                                 ；

③ 有水生成的化合反应                                 。

已知某工程网络计划的计算工期等于计划工期，且工作N的紧后工作均为关键工作，则N( )。

A．总时差为零

B．自由时差等于总时差

C．自由时差为零

D．自由时差小于总时差

工作地段如有临近、平行、交叉跨越，为防止停电检修线路上的感应电伤人，在接或接近导线工作时，应使用个人（）。

A.接地线

B.保安线

C.辅助线

D.跨接线