用两表法测量三相功率时，出现两个功率表读数相等的现象，此时三相功率应是（）。A.两表

阅读理解。

     Mr. and Mrs. Martin live in New York. Mr. Martin is a doctor and his office is in New York. Mrs. Martin

teaches music at a school in New York.

     They have two sons. Their sons' names are Ted and Roy. Ted is twenty years old. He is now in Taiwan.

He is studying Chinese. He went to Taiwan last month and is going to stay there for two years.

      Roy is thirteen years old. He goes to high school. He likes sports very much. He likes swimming best.

He can swim faster than his father. He wants to be the best swimmer in his school.

1. What is Mr. Martin? [ ]

A. He is an American.

B. He is a teacher.

C. He is a doctor.

D. He lives in New York.

2. How many people are there in his family? [ ]

A. Three.

B. Four.

C. Five.

D. Six.

3. What does Ted study? [ ]

A. Chinese.

B. English.

C. Music.

D. Sports.

4. How long will Ted stay in Taiwan? [ ]

A. Twenty years.

B. Two years.

C. Seven years.

D. Thirteen years.

5. What does Roy want to be?[ ]

A. He wants to be a doctor.

B. He wants to teach music at a school.

C. He wants to go to Taiwan to study.

D. He wants to be the best swimmer in his school.

下列测验中属于自陈量表测量的是( )

A．主题统觉测验

B．卜氏儿童社会行为量表

C．品格教育测验(CEI)

D．16种人格因素测验(16PF)

关于天体及其运行，下列表述错误的是：()

A.天球是为了确定天体位置和运动而假想的圆球 

B.在火星和木星轨道之间一个小行星带 

C.黄道面是指月球绕地球运行的轨道面 

D.星座是指天球上投影位置相近的恒星群落

对病因不明疾病的研究中，描述性研究的主要用途是（）

A.早期发现患者

B.早期诊断患者

C.早期治疗患者

D.提出病因假说

E.检验病因假说

肝病时，除外哪项都可用正常剂量（）

A.氨基糖苷类

B.万古霉素

C.多黏菌素类

D.碳青霉烯类

E.林可霉素类