脉冲传递函数（transfer function）

Many middle school students like watching TV very much. But from Monday to Friday, they must go to school. So on Saturday and Sunday they stay at home and watch TV from morning to night. They don’t know it’s bad for their eyes. Usually children like to eat fish, meat and chicken and don’t like vegetables or fruit. They don’t know eating more vegetables or fruit. They don’t know eating more vegetables and fruit is better than eating meat.

At school, the children only do a few minutes of sports or never do any sports. The teachers must know it isn’t good for their health.

We always think of ways to keep healthy. We must eat more vegetables and fruit, do enough sport every day. And we should watch TV and read in right ways.

小题1:Many students stay at home and watch TV from morning to night      .

A．on Fridays

B．from Monday to Friday

C．on Saturday

D．on Saturday and Sunday小题2:What food should students eat more?

A．Meat.

B．Fish.

C．Vegetables.

D．Chicken.小题3: At school, the students should     .

A．do a few minutes of sport

B．never do any sports

C．do enough sport every day

D．All of the above.小题4:How should we keep healthy?

A．Eat more vegetables and fruit.

B．Do enough sports every day.

C．Watch TV in right ways.

D．All of the above.小题5:Which of the following is wrong?

A．From Monday to Friday, some students watch TV from morning to night.

B．Eating more vegetables and fruit is good for their health.

C．They should do enough sport.

D．They should read in right ways.

常温下，对于下列电解质溶液，说法正确的是(    )

A．pH＝1的溶液中，Fe³⁺、I^-、NO₃^-、K⁺可以大量共存

B．在c(SO)＝0.1 mol·L^－1的溶液中,Na⁺、Cl^－、H⁺、Ca²⁺可以大量共存

C．工业上用过量的NaOH溶液吸收SO₂：SO₂ + OH^- ="=" HSO₃^-

D．将AlCl₃溶液滴入NaOH溶液中反应的离子方程式:Al³⁺ + 4OH^- = AlO₂^- + 2H₂O

为避免会阴部撕裂伤，医生为顺产分娩的王女士行会阴右侧切术。产后为避免会阴部疼痛，此时王女士应采取的卧位为（）。

A.左侧卧位

B.右侧卧位

C.平卧位

D.半坐卧位

E.头低足高位

某县一邮局在顾客发信件时，强行要求顾客购买该邮局的邮票和信封，否则不予邮寄，该邮局的行为侵犯了消费者对商品和服务的（     ）

A．公平交易权

B．依法求偿权

C．自主选择权

D．人格尊严权