何为平堵、立堵?

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问题:

何为平堵、立堵?

考点:防汛抗旱知识竞赛防汛抗旱知识竞赛题库
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如果保险公估机构与非法从事保险业务或保险中介业务的单位或个人发生保险业务往来的,由中国保监会给予警告,并处以其违法所得()以下罚款。

A.2倍

B.3倍

C.5倍

D.10倍

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免疫复合物病不包括()。

A.系统性红斑狼疮(SLE.

B.类风湿关节炎

C.部分肾小球肾炎

D.血管炎

E.艾滋病

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(5分)现有一瓶浓度为0.2 mol/L的某酸溶液,可能为醋酸、盐酸、硫酸中的一种。为了确定该酸溶液的组成进行实验:取25.00 mL0.1 mol/L的氢氧化钠溶液,逐滴加入该酸溶液,恰好反应完全时所需该酸溶液体积为12.50 mL。请回答:

(1)该酸不可能是               

(2)用pH试纸测得反应后所得溶液呈碱性,根据此现象说明该酸溶液为       ,用离子方程式说明溶液呈碱性的原因                                  

(3)实验中滴定曲线如右图,在B点,a        12.5(填大于、小于或等于)在C点各离子浓度由大到小排序                                      

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阅读理解。

     Too much TV-watching can harm children's ability to learn and even reduce their chances of getting a

college degree, new studies suggest in the latest effort to examine the effects of television on children.

     One of the studies looked at nearly 400 northern California third-graders. Those with TVs in their bedrooms

scored about eight points lower on math and language arts tests than children without bedroom TVs.

     A second study, looking at nearly 1000 grown-ups in New Zealand, found lower education levels among

26-year -olds who had watched lots of TV during childhood.But the results don't prove that TV is the cause

and don't ride out that already poorly motivated youngsters (年轻人) may wash lots of TV.

     Their study measured the TV habits of 26-year-olds between ages 5 and 15. These with college degrees

had watched average of less than two hours of TV per weeknight during childhood compared with an average

of more than 2 1/2 hours those had no education beyond high school.

     In the California study, children with TVs in their rooms but no computer at home scored the lowest while

those with no bedroom TV but who had home computers scored the highest.

     While this study does not prove that bedroom TV sets caused the lower scores, it adds to accumulating

findings that children shouldn't have TVs in their bedrooms.

1. According to the Caledonia study, the low-scoring group might _____. [ ]

A. have watched a lot of TV

B. not be interested ted in math

C. is unable to go to college

D. have had computers in their bedrooms

2. What is the researchers' understanding of the New Zealand study results? [ ]

A. Poorly motivated 26-year-olds watch more TV.

B. Habits of TV watching reduce learning interest.

C. TV watching leads to lower education levels of the 15-year-olds.

D. The connection between TV and education levels is difficult to explain

3. What can we learn from the last two paragraphs? [ ]

A. More time should be spent on computers.

B. Children should be forbidden from watching TV.

C. 'IV sets shouldn't be allowed in children's bedrooms.

D. Further studies on high-achieving students should be done.

4. What would be the best title for this text? [ ]

A. Computers or Television

B. Effects of Television on Children

C. Studies on TV and College Education

D. Television and Children's Learning Habits

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女,32岁。2年来月经量多,乏力、心悸。检查面色较苍白。血红蛋白70g/ L,白细胞8×109/L,血小板110×109/ L,血清铁300μg/L,治疗首选

A.输血

B.硫酸亚铁口服

C.右旋糖酐铁肌内注射

D.维生素B12肌内注射

E.肾上腺糖皮质激素

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