1NF消除 【20】 依赖，即规范化为2NF；2NF消除依赖非主属性对码的传递函数，

Telnet在Internet上的中文意思是（）。

A、电子邮件

B、文件传输

C、新闻组

D、远程登录

菜豆种子和玉米种子都具有的结构是

A．种皮和胚

B．种皮、胚和胚乳

C．胚和胚乳

D．子叶和胚乳

The small town is so good a place _____ many people come to visit ____  it has become well known all over the world.

A．that ; as

B．as ; as

C．that ; that

D．as ; that

As a new-comer of the class, Sarah hopes to become a friend of___ shares her interests and has common outlooks．

A．whoever

B．whomever

C．no matter who

D．anyone

在打捞潜油电泵机组以上工具、油管时，应注意在潜油电泵机组以上要留（）件下井工具或油管短节，为下一步打捞震击留有抓捞部位。

A、1

B、2

C、1—2

D、2—3