简述尿频、尿急、尿痛的概念。

Last Friday my friend Deborah asked me if I would like to learn how to make tofu. I couldn’t think of any good reason not to be interested in, so I said, "Yes". The next day I met her and another three nice people at the Hodo Soy Beanery Oakland. I enjoyed the trip. I got a lot from the trip. The following is what I learnt. 

Tofu has a history of 2,000 years. Although the word "tofu" is from Japanese, the food maybe comes from China. There are two main kinds of tofu: soft tofu (软豆腐) and firm tofu (硬豆腐). In some parts of Asia, people use tofu as a kind of meat. 

Douhua is one kind of soft tofu. It is a popular breakfast food in China. Because it is very soft, people can’t eat it with chopsticks, but with a spoon (勺子). People often eat it as a snack (小吃) and often add spring onions and gravy to it. In Malaysia, people usually eat douhua with white or dark sugar water.

根据材料内容选择最佳答案，并将其标号填入题前括号内。

小题1:When did the writer go to Hodo Soy Beanery Ockland?

A．Last Thursday.

B．Last Friday.

C．Last Saturday.

D．Last Sunday.小题2:How many people went there with the writer? 

A．One.

B．Two.

C．Three.

D．Four.小题3:We can learn from the passage that the food tofu may come from ______.

A．Japan

B．China

C．Oakland

D．Malaysia小题4:The underlined word "chopstick" means "______"in Chinese.

A．筷子

B．盘子

C．叉子

D．杯子小题5:Which of the following is NOT true according to the passage?

A．People began to make tofu 2,000 years ago.

B．Some people use tofu as a kind of meat.

C．Douhua is one kind of firm tofu.

D．Many people eat tofu as a snack.

四边形的两条对角线长分别是6cm和8cm，顺次连接这个四边形各边中点，所得的新四边形的周长是______cm．

线路上的感应过电压为随机变量，其最大值可达( )，一般仅对35kV及以下线路的绝缘有一定威胁。

A．50～100kV

B．100～200kV

C．200～300kV

D．300～400kV

男性，67岁，胸痛、气短1周，胸部X线检查示右侧大量胸腔积液，胸穿示血性胸水，ADA为20U/L。其原因最可能为

A．结核性胸膜炎
B．结缔组织病
C．恶性肿瘤胸膜转移
D．肝硬化
E．心力衰竭

（）

A．弱冻胀

B．冻胀

C．强冻胀

D．特强冻胀