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问题 单项选择题

二进制数1100100转换成十进制整数等于( )。

A．96

B．100

C．104

D．112

答案

参考答案：B

解析：
二进制数转换成十进制数的方法是将二进制数按权展开：(1100100)2=1×26+1×25+0×24+0×23+1×22+0×21+0×20=100

填空题

从－2，－1，2这三个数中任取两个不同的数作为点的坐标，该点在第四象限的概率是_______．
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补全对话，情景问答
从方框中选择适当的句子完成对话，其中有两项为多余选项。
A.What about you?
B.How long will you have to work?
C.Is there anybody to go with you?
D.Do you like it?
E.Wish you a good time.
F.What are you going to do?
G.We will go there together.
A:The summer holidays will  start next month.   1  
B:I'd like to go swimming.
A:That'll be very interesting．__2  
B:Yes,Dad will go with me.He is very good at swim-ming.I need a teacher.I just started to learn it lastyear．__3    
A:I am going to help my father with his farm work.It's the busiest time of the year for him.
B:  4    
A:Maybe three or four weeks.Then I can do some other  things for myself,like playing football or swimming.
B:  5  
A:Thank you．
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