乳牙患龋率高峰年龄段为 A．3～4岁 B．5～6岁 C．7～8岁 D．9～10岁 E

阅读理解。

                                                       The Artist and the Beggar (1) 

    An artist was coming home by train one day. He hadn't much money but was very kind. He gave his last

few coins(2) to a beggar, but he saw another one, and forgot that he didn't have any money in his pockets.

He asked the man if he liked to have lunch with him, and the beggar, of course, agreed. So they went into a

small restaurant and had a good meal.

    In the end, the artist could not pay the bill (3), and the beggar had to do so. The artist felt very sorry for it,

so he said to the beggar, "Come home with me in a taxi, my friend. And I'll give you the money for our lunch."

"Oh, no!" the beggar answered quickly. "I had to pay for your lunch, but I'm not going to pay for your taxi

home!"

Notes: (1)beggar n. 乞丐 (2)coin n. 硬币 (3)bill n. 帐单

1. What kind of man was the artist? 　　

2. What did he do to the first beggar? 　　

3. What did the artist forget when he invited another beggar to have lunch with him? 　　

4. Who paid for the meal? 　　

5. What did the artist want to do at last? 　

6. Why didn't the beggar go home with the artist?

观测线圈匝数对电磁铁磁性强弱的影响时，要保持______和______相同；观测线圈中电流对电磁铁磁性强弱的影响时，要保持______和______相同；观测铁心对电磁铁磁性强弱的影响时，要保持______和______相同．以上测量方法实际上就是物理学上所说的______．

三组比较的秩和检验，样本例数均为6，确定P值时应查

A．X²界值表

B．H界值表

C．T界值表

D．F界值表

E．u界值表

[问题4] 在Windows操作系统下，DHCP客户端“Internet协议(TCP/IP)属性”配置界面如下图所示。在此界面中，客户端应如何配置

提出了综合激励模式的加拿大学者是( )

A．亚当斯
B．波特尔
C．豪斯
D．弗鲁姆