彩色多普勒血流显示的叙述，错误的是A．速度—方羞显示：彩色及色调表示血流方向 B．速

在访问Internet时必须在计算机中安装Internet Explorer才能够访问Internet站点。( )

根据短文内容和以下提示:1)首字母提示，2)语境提示，3)汉语提示，在每个空格内填入一个适当的英语单词。所填单词要求意义正确，拼写准确。

The Internet has become 小题1: p      of teenage life.

A new report on 3,375 students aged from 10 to 18 in seven Chinese cities 小题2:   （报导）that 38 percent of them believe they use the Internet often.

Most of them get useful information and 小题3:   (提高) their study by using the Internet, while some are not using it in a good way.

In order to help young people use the Internet in a good way, a textbook 小题4:   good Internet behavior has started to be used in some middle schools in Shanghai this term. The book uses many real 小题5:   （例子）to teach students all about good ways of using the Internet, and it gives useful 小题6: a     such as it’s good to read news or find helpful information about study.

Some students also make online friends. But if you are meeting an online friend, make sure your parents know. Teachers and parents all think the book is of 小题7:g     help. A teacher said the book would be a guide for teenagers 小题8:    using the Internet. She believes it will keep students 小题9:    from bad websites（网址）. “Many students are using the Internet without good guidance（指导）from their parents.” She said, “The book will teach students 小题10:     to be a good person in the online world.”

腰麻平面取决定（）

A.用药容积

B.用药比重

C.病人体位

D.注药速度

E.穿刺间隙

与通货膨胀相反，通货紧缩有利于( )。

A．债权人

B．债务人

C．生产者

D．投资者

燃机在基本负荷运行时，压气机抽气AE-9的作用。（）

A.防止压气机喘振

B.冷却透平第2级静叶

C.冷却透平第2级动叶

D.冷却透平第3级静叶