地漏用于排泄卫生间等室内的地面积水，形式有( )。 A．筒式 B．混合式 C．钟罩

阅读理解。

       The Blacks are American tourists. They visits now in Beijing. This is their first visit to China.

They are going to stay in China for three months. They want to visit some big cities and villages.

They hope to learn some Chinese, too.

       Mr Black is a taxi driver. He likes to drive in Beijing. Mrs Black is a school teacher. She is

visiting a city school today and a village school tomorrow. Their daughter is a middle school student.

She is going to meet some Chinese students.

       They are taking a lot of pictures in China. When they return to America, they are going to show

the pictures to their friends. They want the American people to know more about China.

1. The Blacks are from ______.

A. China

B. England

C. Canada

D. the USA

2. The Blacks are staying in ______ now.

A. England

B. Beijing

C. Shanghai

D. New York

3. Mr Black is ______.

A. a teacher

B. a doctor

C. a taxi driver

D. a worker

4. There are ______ people in Mr Black's family.

A. two

B. three

C. four

D. five

5. Why are they going to show the pictures to their friends when they go back to America?

A. Because the pictures are very beautiful.

B. Because they like China.

C. Because they want the American people to know more about China.

D. Because they want the American people to come to China.

妊娠合并心脏病，不会出现下列哪项体征（）

A.心房颤动

B.室性早搏

C.舒张期奔马律

D.心尖区舒张期杂音

E.Ⅲ级或以上粗糙的收缩期杂音

对提高人群免疫力起关键作用的措施是（）

A.加强营养

B.锻炼身体

C.注射丙种球蛋白

D.预防接种

E.预防服药

日本发生的“骨疼病”公害就是（）中毒引起的，也正是在此之后才开始了对镉毒性的重视。

A.镉

B.汞

C.铅

D.砷

关于行业组织在市场垄断行为中的影响，下列说法错误的是( )。

A．行业协会在反垄断中的作用是不可低估的

B．行业协会可能会排除、限制竞争

C．我国市场经济还不成熟，目前不存在行业协会等组织排除、限制竞争行为的情况

D．行业协会实施反竞争的行为，最典型的表现是组织实施价格联盟