如果a+b=0，那么a，b两个实数一定是（ ） A．都等于0 B．一正一负 C．

阅读理解。

A: Look, it is a picture of my family.    

B: Oh, it is a nice picture.  Eric, Who is this man?

A: It's my father.                    

B: Is the girl your sister?

A: Yes, she is.                      

B: How old is she?

A: She's six.                      

B: Are you in the same school?

A: No, we are not.                  

B: Is the woman your mother?

A: Yes, she's a nurse.                

B: She looks young(年轻的)and beautiful.

A: I look like her.                  

B: Who's that?

A: Who? The baby(婴儿)?        

B:Yes.

A: Guess(猜)!                  

B: Is it your brother?

A: No.                            

B: I know (知道) it's you.

A: That's right. I look lovely (可爱的).

1.  What photo is it?          

A. A photo of a girl.                

B. A photo of people.

C. A photo of a room.              

D. A photo of a family

2.  How old is the sister?         

A. 7.        

B. 6.          

C. 9.        

D. 10

3.  What is her mother?          

A. She is a doctor.                  

B. She is a teacher.

C. She is a nurse.                  

D. She is a worker.

4.  Are Tom and his sister in the same school?            

A. Yes, he is.                    

B. No, he is not.

C. Yes, they are.                  

D. No, they are not.

5. How many people are there in the family?              

A. Four.      

B. Five.      

C. Three.      

D. Two.

新华网北京2009年11月2日电，据新华社全国农副产品和农资价格行情系统监测，受雨雪及大风降温的影响，蔬菜全国平均价格与前一日相比整体上涨。可见，商品价格[ ]

A．受天气等因素影响

B．由供求关系决定

C．随机波动，无规律可循

D．都具有较大的变化弹性

不符合多发性骨髓瘤实验室改变的是

A．高尿酸血症

B．高钙血症

C．高白蛋白血症

D．高粘稠血症

E．碱性磷酸酶增高

25岁，男性，近1周间断便鲜红血，伴肛门部坠胀感，首先应选（）。

A.大便潜血检查

B.直肠指诊

C.乙状结肠镜检查

D.纤维结肠镜检查

E.血常规

孕母诉：第一胎孕7月早产，生后两天因呼吸不规则，抽风，诊断为"颅内出血"，经抢救无效死亡，现孕8个月今日见红入院，担心胎儿又会有生命危险，下列哪项措施对预防有效（）

A.提高产科技术，避免窒息、产伤

B.胎儿娩出后保持安静、密切观察病情

C.胎儿娩出后注意保暖，缺氧时吸氧

D.胎儿娩出后，按20-30ml/kg静推5%碳酸氢钠

E.胎儿娩出后，肌注维生素K5mg