采用三角架法起立电杆时，当（）时应停止牵引，由各工位工作人员对所在点的各部位受力进行

真空断路器在机械性能方面的优点是结构简单、（）。

A.体积小

B.燃弧时间短

C.所需操作功率小

D.触头寿命长

加达公司2011年年初利润分配－未分配利润借方余额370,000元(系上年度亏损)，至12月初全年累计利润总额5,000,000元，其中包括国库债券利息收入50,000元。12月份有关损益类账户的发生额如下：主营业务收入1,020,000元，主营业务成本600,000元，销售费用10,000元，营业税金及附加14000元，其他业务收入40,000元，营业外收入500元，其他业务成本3,000元，营业外支出20,000元(其中非公益性捐赠支出10,000元)，管理费用5,000元，财务费用1,500元，投资收益23000元(其中20,000元为购买国库债券利息所得)所得税税率为25%。

计算该企业可供分配利润；(2分)

首次公募股票申请人最近3年内( )的，属于重大违法行为。

A．法定代表人受过刑事处分

B．发起人出资不实

C．在设立或运作期间未履行合法的审批、登记程序

D．以欺诈手段发行证券

Most children, even the youngest of children, are delighted to be around cats and dogs. But these pets carry plenty of germs and allergens（过敏原）,prompting researchers to ask: Are cats and dogs really safe for children？

A study finds that, contrary to many parents' fears, owning cats or dogs does not increase a child's risk of developing allergies, and in fact, may actually protect them. The study's lead author, Dr. Dennic Ownby of the Medical College of Georgia, says that even he was "very surprised" by the results. Ownby and colleagues followed more than 470 children from birth to age 6 or 7, comparing those exposed to cats and dogs during their first year of life to those who were not.

By using skin-prick tests for detecting common allergies, the researchers found that, contrary to what many doctors had been taught for years, children who had lived with a pet were not at greater risk.

Even more remarkable, children who had two or more dogs or cats had an even greater reduction, up to 77 percent, in risk of allergies. Researchers suggest this protective effect may be the result of early exposure to lots of bacteria that are carried by dogs and cats. Exposing young children to these bacteria helps" exercise" their immune systems early in life so that they're better able to resist allergic diseases later.

There's something very important in that first year of life when the immune system is developing that we can retrain it away from an allergic response, said Dr. William Davis.

And while researchers are not encouraging parents to buy dogs or cats just to reduce a child's allergy risk, they say if a family already has one or more animals, there's no need to get rid of them.

小题1:Why do the researchers feel “very surprised” by the results of the study?

A．Because the results are contrary to their expectation．

B．Because so many children are playing with cats and dogs．

C．Because parents are so much worried about their children．

D．Because children with animals may develop allergies easily．小题2:Compared with children who have pets，those who haven’t  ______.

A．will lose the chance to develop immune system

B．may suffer allergic diseases more often

C．will reduce the harm from bacteria

D．can keep doctors away小题3:It can be inferred from the passage that ______．

A．pets are ill-treated by their owners

B．less families would like to own cats and dogs

C．keeping pets is a good way to keep children healthy

D．the results of the study can make families with pets feel at ease小题4:The underlined word “it” in the fifth paragraph refers to________.

A．the early life

B．an allergic disease

C．immune system

D．something important小题5:What may be the best title of the passage?

A．How to protect your kids from allergies

B．Your pets may be helping your kids

C．Bacteria do good to your kids

D．Advantages of owning pets

程控室操作台共有哪三个控制手柄？