槽型托辊一般由3个短托辊组成，槽角一般为（）主要用于上托辊。A、30。 B、35。

聚氯乙烯（PVC）管是目前常用的给水塑料管材，若处理不当可带来一定健康危害，其中可能具有致癌性作用的物质是（）。

A.聚氯乙烯树脂

B.二氯乙烯

C.氯乙烯单体

D.二氯乙烷

E.聚乙烯

Zoe Chambers was a successful PR(Public Relations) consultant and life was going well — she had a great job, beautiful flat and a busy social life in London. Then one evening in June last year, she received a text message telling her she was out of work. “The first two weeks were the most difficult to live through.” she said. “After everything I’d done for the company, they dismissed me by text! I was so angry and I just didn’t feel like looking for another job. I hate everything about the city and my life.”

Then, Zoe received an invitation from an old school friend, Kathy, to come and stay. Kathy and her husband, Huw, had just bought a farm in north-west Wales. Zoe jumped at the chance to spend a weekend away from London, and now, ten months later she is still on the farm.

"The moment I arrived at Kathy's farm, I loved it and I knew I wanted to stay." said Zoe. "Everything about my past life suddenly seemed meaningless."

Zoe has been working on the farm since October of last year and says she has no regrets. "It's a hard life, physically very tiring." she says. "In London 1 was stressed and often mentally exhausted. But this is a good, healthy tiredness. Here, all I need to put me in a good mood is a hot bath and one of Kathy's wonderful dinners."

Zoe says she has never felt bored on the farm. Every day brings a new experience. Kathy has been teaching her how to ride a horse and she has learnt to drive a tractor. Since Christmas, she has been helping with the lambing — watching a lamb being born is unbelievable, she says, "It's one of the most moving experiences I've ever had. I could never go back to city life now."

小题1:When working as a PR consultant in London, Zoe thought she lived a ______life.

A．satisfying

B．tough

C．meaningless

D．boring小题2:The most important reason why Zoe went to visit Kathy's farm is that______.

A．Zoe lost her job as a PR consultant

B．Kathy persuaded her to do so

C．Zoe got tired of the city life

D．Zoe loved Wales more than London小题3:How docs Zoe feel about the country life according to the passage?

A．Tiresome and troublesome.

B．Romantic and peaceful

C．Mentally exhausting but healthy

D．Physically tiring but rewarding.小题4:Which of the following is closest to the main idea of the passage?

A．A friend in need is a friend indeed.

B．Where there is a will, there is a way.

C．A misfortune may turn out a blessing.

D．Kill two birds with one stone.

职业人员5年内接受的剂量限值是()

A．100mSv

B．50mSv

C．1mSv

D．150mSv

E．500mSv

第16～25小题，要求判断每题给出的条件(1)和(2)能否充分支持题干所陈述的结论．A、B、C、D、E五个选项为判断结果，请选择一项符合试题要求的判断．
A．条件(1)充分，但条件(2)不充分．
B．条件(2)充分，但条件(1)不充分．
C．条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
D．条件(1)充分，条件(2)也充分．
E．条件(1)和(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．

a=-4．
(1) 点A(1，0)关于直线x-y+1=0的对称点是
(2) 直线l₁：(2+a)x+5y=1与直线l₂：ax+(2+a)y=2垂直

SDH设备维护作业计划要求各级网管生产部门定期核对各种参数，有（）

A.配置数据

B.参数设置

C.主备倒换

D.同步源设定