充血性心力衰竭时血流动力学异常的特点是（） A.心排血量降低，心室舒张末压力增高 B

根据短文内容，选出正确的答案。

       Mr Liu went to Japan(日本) last year. He went there with his big family-his parents, his wife and his

son. Mr Liu's father was retired(退休的). His mother was a housekeeper(家庭主妇). His wife was a

Chinese teacher. She taught Chinese in Japan. The boy-Liu Xiaoming was a primary school(小学) student. He was good at Chinese, English and maths. But he couldn't speak Japanese well.

1. How many people are there in Mr Liu's family?

A. three                    

B. five                  

C. four

2. Was Mr Liu's father retired?

A. Yes, he was.                

B. No, he wasn't.        

C. sorry.

3. Mr Liu's wife is a _______.  

A. Chinese teacher            

B. English teacher        

C. Japanese teacher

4. Liu Xiaoming was not good at _______.             .

A. Japanese                  

B. Chinese                

C. English

5. Mr Liu's mother is a ______.  

A. teacher                    

B. worker                

C. Housekeeper

下列化学用语书写正确的是

A．乙烯的结构简式：CH₂CH₂

B．硝基苯的结构简式：

C．丙烷分子的球棍模型示意图：

D．—CH₃(甲基)的电子式为：

SDH自愈网的实现手段有线路保护倒换、（）、网孔形DXC保护和混合保护。

绿色开花植物一生中必须经历的两个重要过程是（　　）

A．开花和传粉

B．传粉和受精

C．开花和受精

D．开花和结果

冷弯实验是确定材料接受（）的能力。

A.成分

B.刚性

C.弯曲

D.拉伸