为了解肾脏积水的严重程度，下列检查哪一项帮助不大（）。 A.B超检查 B.同位素肾图

Teeth are important. Strong, healthy teeth help you chew foods that help you grow. They help you speak clearly. And, they help you look your best. Here are some advice for you to take care of your teeth.

● Brush your teeth the right way.

Brush your teeth at least twice a day after breakfast and before bedtime. If you can, brush after lunch or after sweet snacks（快餐）, too.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

Brush all your teeth, not just the front ones. Spend time brushing teeth along the sides and back of your mouth. Brush away from your gums（齿龈）, too.

Spend at least three minutes each time you brush. Play a song you like to help pass the time.

Get a new toothbrush every three months. When you buy your tooth brush, be sure it has soft bristles（鬃毛）.

● Learn how to floss your teeth.

Flossing is a very important way to keep your teeth healthy. Food may hide in places where a toothbrush cannot get to, like the space between the teeth. Flossing can help get rid of it. Carefully move the floss between two teeth, up and down. You need to floss your teeth at least once a day.

● Have good eating habits.

You need to be careful about what you eat and drink. Eating sugar is a major cause of tooth decay（腐朽）. Eating sugar before you go to bed can make things even worse. Eat lots of fruit and vegetables and drink water instead of soda.

小题1:           is helpful to your teeth.

A．Eating fruit and vegetables

B．Eating sweet snacks

C．Eating sugar

D．Drinking soda小题2: Which is the right way of brushing the teeth?

A．We should brush our teeth once a day.

B．We should keep our toothbrush away from our gums.

C．When we brush our teeth, at least three minutes is needed.

D．Brush our teeth before breakfast.小题3: From the passage, do you know how to floss the teeth?

A．Go to see a dentist.

B．Fix a floss on the teeth.

C．Move the floss between two teeth.

D．Chew the floss in the mouth.小题4:Which of the following is NOT true ?

A．Flossing can help get ride of the food that hides between two teeth.

B．Healthy teeth can help you look more beautiful.

C．We don’t have to brush our teeth if we eat a lot of fruit and vegetables.

D．Your toothbrush should be changed every three months.小题5: The best title for the passage is          .

A．How to floss your teeth.

B．How to have good eating habits.

C．How to brush your teeth.

D．How to take care of your teeth.

女，26岁，产后3周，右侧 * * 胀痛，伴寒战、高热。查体：右侧 * * 肿大，内下象限可扪及一直径约4cm肿块，局部红肿，压痛（+）

若穿刺后抽出脓液，则应（）

A.继续哺乳

B.局部药物外敷

C.物理疗法

D.用吸乳器吸净乳液

E.脓肿切开引流术

中国半殖民地半封建社会的含义是指中国50%是殖民地，50%是封建社会。

根据《民用爆炸物品安全管理条例》（国务院令第466号）于2006年，民用爆炸物品生产企业应当在办理工商登记后（）日内，向所在地县级人民政府公安机关备案。

A.3

B.5

C.7

D.10