行政复议机关决定撤销或者确认具体行政行为违法的情形包括( )。A．主要事实不清，证

光合作用的实质是 [ ]

A．把CO₂和水转变为有机物，同时把光能转变成化学能储存在有机物中

B．利用光能吸收CO₂放出O₂，使大气中的CO₂和O₂的含量基本保持恒定

C．进行光反应，把光能转变成化学能储存在有机物中

D．H₂O和CO₂合成以葡萄糖为主的有机物，供其他生物利用

治疗中风中经络的痰热腑实，风痰上扰证应首选（）。

A.镇肝熄风汤

B.天麻钩藤饮

C.星蒌承气汤

D.桃红四物汤

E.补阳还五汤

     People have often wondered about Margaret Thatcher's famous claim that she only needed four

hours of sleep a night. People were amazed that former British Prime Minister had managed to run the

country on so little sleep. Most people need at least seven or eight hours rest every night.

     But now scientists have discovered a gene(基因)that affects the amount of sleep we need and which

allows some people to survive on fewer hours. They found a mother and a daughter who have a rare

gene that allows them to sleep less than the rest of their family -but still feel alert during the day. The pair

managed to stay alert on about six hours sleep a night, two hours less than the rest of their family needs.

     The finding, published in Science magazine, offers a new direction for studies on how sleep affects

health. Experts say adults need seven to nine hours of sleep for good health, while teenagers and kids

need more. People who don’t get enough sleep are more likely to get sick and suffer from memory loss.

     In 2001,scientists at the University of California discovered a mutation(突变)in a gene that causes

people with that gene to have very unusual sleeping patterns. These people go to bed around 7:30 pm

and wake around 3:30 am.

     Now the team has found a gene that affects how long a person can stay asleep. In the family they

studied, the 69-year-old mother and her 44-year-old daughter usually went to bed around 10 pm. The

mother woke up around 4 am, and her daughter woke up around 4:30 am. Both of them felt fully rested.

     Blood tests showed the women have a mutation in a gene named DEC2, which regulates the body's

clock.

     Researcher Ying-Hui Fu bred(培育) mice and fruit flies to carry the mutation. The flies and mice with

the mutation slept less than ordinary flies and mice, and needed less time to recover from little sleep.

1. What is the main idea of the passage?

A. Less sleep does not affect people's health.

B. Different people have different sleeping patterns.

C. New measures can reduce the effect of less sleep on health.

D. The hours we need to sleep may be affected by some gene in our body.

2. The underlined word "alert" in Paragraph 4 is similar in meaning to        .

A. comfortable

B. wide awake

C. quite alive

D. sleepy

3. In the study, the mother and the daughter       .

A. were found to have a mutation in the gene DEC2

B. were asked to sleep less than other family members

C. had the same sleeping pattern as other family members

D. suffered from memory loss for sleeping only six hours a night

4. According to the passage, the new finding can help       .

A. recover memory loss

B. cure sleeping problems

C. get rid of mice and fruit flies more easily

D. explain why some people need less sleep to feel fully rested

对违反治安管理行为，《治安管理处罚法》规定拘留并处罚款的，若行为人具有减轻处罚情节，可以在法定处罚幅度以下单独或者同时减轻拘留和罚款，或者在法定处罚幅度内单处拘留。

某行业内，市场份额在前4名的企业的具体市场占有率分别为：0.15、0.11、0.09、0.05，则CR4是_____。

A．0.05

B．0.1

C．0.2

D．0.4