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单项选择题

固定污染源烟气在线监测系统（CEMS）采样口应优先选择的位置是（　　）。

A.水平管段的负压区域
B.垂直管段的负压区域
C.水平管段的正压区域
D.垂直管段的正压区域
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单项选择题
Jim was a greedy boy.He enjoyed having good food.One day when he came to have breakfast,he found there was only bread and gruel(麦片粥).So he didn′t want to have any.Then he thought out a plan to fool his mother and get something good to eat.He put his hands on his stomach and said,"I′ve got a stomachache,Mum,and I don′t want any breakfast now."His mother said,"I′m sorry to hear that.Go to Doctor Jones and he will give you some medicine.You know his house."Then she gave Jim some money and let him go by bus.Jim got off the bus after five minutes′fide.He didn′t go to seeDr.Jones.He went into a shop and bought some pieces of cakes.
Jim was eating the cakes on his way back home.When he got home,his mother asked him,"What did Dr.Jones say,my boy?"Jim answered,"He said good food is better than any medicine for my stomachache.So I went and bought some cakes instead of buying medicine."
Now Jim′s mother knew what Jim′s stomachache meant.
At last Jim′s mother
A.gavehersonsomegoodfood
B.knewhersonhadtoldalie
C.boughtsomemedicineforherson
D.boughtsomecakesforherson
单项选择题
Jim was a greedy boy.He enjoyed having good food.One day when he came to have breakfast,he found there was only bread and gruel(麦片粥).So he didn′t want to have any.Then he thought out a plan to fool his mother and get something good to eat.He put his hands on his stomach and said,"I′ve got a stomachache,Mum,and I don′t want any breakfast now."His mother said,"I′m sorry to hear that.Go to Doctor Jones and he will give you some medicine.You know his house."Then she gave Jim some money and let him go by bus.Jim got off the bus after five minutes′fide.He didn′t go to seeDr.Jones.He went into a shop and bought some pieces of cakes.
Jim was eating the cakes on his way back home.When he got home,his mother asked him,"What did Dr.Jones say,my boy?"Jim answered,"He said good food is better than any medicine for my stomachache.So I went and bought some cakes instead of buying medicine."
Now Jim′s mother knew what Jim′s stomachache meant.
That day Dr.Jones
A.gaveJimsomemedicine
B.wenttoseeJim
C.didn'tmeetJimatall
D.advisedJimtobuysomecakes
单项选择题
共用题干
2008年，借着中国举办奥运会的契机，很多对情侣选择在这一年走进婚姻的殿堂，孙先生和赵女士就是其中的一对。新婚不久，孙先生在朋友的建议下，决定为家庭补充必要的商业保险。孙先生为赵女士购买A保险产品，并制定自己为受益人；又为自己和赵女士购买B联合保险产品，该产品规定联合投保人中只要有一个人生存，年金就照常给付，直到全部被保险人死亡之后才停止。根据案例回答下列问题。
A.孙先生和保险公司
B.赵女士和保险公司
C.孙先生和保险代理人
D.孙先生和赵女士
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