营养缺陷型鼠伤寒沙门氏菌株发生rfa突变可使() A.DNA易误性修复增加 B.DN

题型:单项选择题 A1型题

问题:

营养缺陷型鼠伤寒沙门氏菌株发生rfa突变可使()

A.DNA易误性修复增加

B.DNA切除修复基因缺失

C.细胞壁脂多糖屏蔽作用丧失

D.自行合成组氨酸能力恢复

E.抗紫外线照射能力增强

考点:公卫执业医师卫生毒理学卫生毒理学题库
题型:单项选择题 A1型题

If you want to keep fit, please refer to the following:

Move More

Make it a daily to find ways to move your body.  小题1:Climb stairs instead of taking the elevator(电梯). Walk your dog; play with your kids. It doesn’t have to be an hour in the gym or a 45-minute dance class. But that’s great when you’re up to it. At the same time, move more.

Give up Smoking

Ever since 1960 when it was announced that smoking was harmful to health, Americans have been reducing their use of tobacco products. Just recently, we’ve seen more and more teens smoking. Could it be the Hollywood influence?  小题2:  Take care! Warn your children against smoking.

 小题3:  

While recent studies show a glass of wine or one drink a day can help protect against heart disease, more than that can cause other health problems such as liver and kidney(肝肾) disease and cancer.

Reduce Stress(压力)

Easier said than done, stress comes in many ways.  小题4:  Spend 30 minutes a day doing something you like such as walk on the beach or in a park, read a good book, visit a friend, listen to relaxing music, and watch a funny movie.

Protect Yourself from Pollution

If you can’t live in a smog-free environment, at least avoid smoke-filled rooms. 小题5:  Exercise indoors in air conditioning when air quality is good.

A.Avoid Excessive(过量的) Drinking

B.There are many things you can do to move your arms and legs.

C.Think carefully about what you will do.

D.Exercise outside when the smog rating is low.E. It seems that the stars in every movie smoke cigarettes.

F. Keep a Positive Mental Outlook

G. Some techniques given by experts are to think positive thoughts.

题型:单项选择题 A1型题

髓劳之热入营血证,治宜

A.犀角地黄汤

B.圣愈汤

C.右归丸

D.左归丸合二至丸

E.小营煎

题型:单项选择题 A1型题

BRITAIN is a popular tourist place. But tours of the country have advantages and disadvantages .

ADVANTAGES

Free museums. No charge for good collections of art works

Pop music. Britain is the only country to rival(与…匹敌)the US on this point.

Cabs. London taxi drivers well know where they are going.

Choice of food. Visitors can find food from every corner of the world .

Fashion. Not only do fashion junkies love deeply and respect highly brand names such as Vivienne Westwood, Alexander McQueen; street styles are justly loved, too.

  DISADVANTAGES

  Poor service. People can dine out on the rudeness they have experienced,” says Professor Tony Seaton, of Luton University’s International Tourism Research Center.

  Poor public transport. Trains and buses are promised to defeat tourists who have the most patience, so the over- crowded London tube is inexplicably(难以理解的) popular.

  Rain. Still in the number one complaint. 

  Overpriced hotels. The only European country with a higher rate of tax on hotel rooms is Denmark.

Drinking hours. Alcohol(酒) is in short supply after 11 pm even in “24-hour cities”.

小题1:What do tourists complain most?

A.Poor service.

B.Poor public transport.

C.Rain.   

D.Overpriced hotels.小题2: When is alcohol not able to get?

A.At 9: 00 pm

B.At 10: 00 pm

C.At 11: 00 pm

D.At 12: 00 pm小题3:Which of the following is true according to the passage?

A.You have to pay to visit the museums.

B.Only clothing with brand names are sold in London .

C.You cannot find Chinese food there.

D.The public transport is poor there.

题型:单项选择题 A1型题

债券因有固定的票面利率和期限,相对于股票价格而言市场价格比较稳定。 ( )

题型:单项选择题 A1型题

关于火箭发动机动力的来源的说法中正确的是()。

A.是燃料燃烧时产生的向后

B.是发动机对喷出燃烧气体的强大推力

C.是火箭飞行时周围空气

D.是火箭喷出气体

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