当光源所发出的光的颜色与（）在某一温度下辐射的颜色相同时，（）的温度称为该光源的色温

阅读理解

       It's Monday today. Miss White comes into the classroom. She sees Mike, the tallest student, is

standing in front of the blackboard and speaking like a teacher. The boy does not see her and is still

standing there. The children begin to laugh and he looks round and finds Miss White is standing behind

him, so he runs back to his row.

       "Morning, class," says Miss White. "Morning, Miss White." Ann stands up and says,"Sam and I are

on duty today. Sixteen boys and eighteen girls are all here." Sixteen boys? Who doesn't come today?"

asks Miss White. "Bill and his family move to London." "Oh, I see," Miss White says. But she sees a cat

on the teacher's desk. She asks, "Who draws the cat here?" No child answers, but they are looking at

Mike. So she says, "Can you answer the question, Mike?" He has to say, "I am sorry, I do." "You are

the worst child in your class!" "It's not my fault. Why do you let Bill leave?"

1. The children begin to laugh because ____. 

A. Mike wants to be a teacher             

B. Mike draws a cat on the teacher's desk

C. Mike doesn't find Miss White behind him   

D. Mike wants to clean the blackboard

2. The other children look at Mike because_____ .

A. Mike looks like a teacher                

B. they think Mike does wrong

C. they thinks Mike does right               

D. Mike is the tallest of class.  

3. Miss White thinks there are ____ students in Mike's class.

A. 32    

B. 33    

C. 34    

D. 35

4. The words "worst" and "fault" in the story mean ____ in Chinese.    

A. 最好的， 过错    

B. 最坏的，过错    

C. 最好的，功劳    

D. 最坏的，功劳

分析多肽E和多肽F(均由一条肽链组成)得到以下结果：

多肽E和多肽F中氨基酸的数目可能是[ ]

A．199和181

B．340和281

C．58和53

D．51和49

关于胎心音的描述，正确的选项是（）。

A.胎心音与孕妇的心率近似

B.为单音响、吹风样杂音

C.多伴有杂音

D.孕20周末，用一般听诊器可经孕妇腹壁听到

E.孕24周末，在胎儿肢体侧听得最清楚

工程承包合同可根据( )，从监理工程师管理合同、管理承包合同、建造管理合同中选择适用的合同形式。

A．投资人愿意采用的支付方式

B．政府主管部门指定的支付方式

C．承包商愿意采用的支付方式

D．工程监理制度的规定

有益组分