矿物质中含量占机体总重量（）以上者称为常量元素。A.0.01％ B.0.1％ C.1

绕阴器的经脉是：( )

A．足厥阴经

B．手厥阴经

C．足少阴经

D．手太阴经

E．足太阴经。

Word Power

Author（s）: Kaplan $13,95

You'll never be at a loss for words again．Energize your vocabulary with must-know everyday words that are the essentials of a good vocabulary, engaging lessons to help you use words in text, hot words often found on tests, tips to help you figure out new words, roots, and more．

Grades: 8 & up Ages: 13 & up

Word Smart Junior

Author（s）: Russell Stauffer $ 17．95

Now this is the way to add new words to your vocabulary! Word Smart Junior will make you laugh so much．You'll be amazed that you've just learned more than 120 fascinating and very useful words! Parents, teachers, and friends will marvel at your eloquence （口才）!

Grades: 3-5 Ages: 8-10

Grammar Smart Junior

Author（s）: Marcia Reynolds $ 16．85

Do you quake when your teacher says, "Now it's time for grammar"? Do your verbs agree with your subjects?

Fear no more! A big Hollywood producer and a famous movie star will help you learn all those nasty （讨厌的） elements of grammar．You'll be amazed at how quickly you learn, and how much fun it can be．You'll finally know your grammar backwards and forwards and you'll never have to worry about it again．

Grades: 7-9 Ages: 12-14

Grammar Smart: An Audio Guide to Perfect Usage

Author（s）: Julian Fleisher $ 12．68

The words you use say a lot about you ．．．but the way you put them together says even more．Your grammar makes an immediate and lasting impression on your teachers, and even your friends．So don't make the mistake of thinking that grammar is too complicated．We've created Grammar Smart to help you write and speak with clarity and confidence．

Grades: 6-8 Ages: 11-13

小题1:If a ten-year-old boy wants himself to be admired because of his speech ability, he may buy ____．

A．Word Power

B．Word Smart Junior

C．Grammar Smart Junior

D．Grammar Smart: An Audio Guide to Perfect Usage小题2:By saying "You'll finally know your grammar backwards and forwards", the writer means "_____"．

A．You will be clearly familiar with grammar

B．You will know the history of grammar

C．You will know the make-up of grammar

D．You will learn about the future of grammar小题3:The four books are all about ____．

A．fiction and mysteries

B．parenting and teaching

C．literature and arts

D．language study

来源于禾本科的药材是（）

A.小茴香

B.金樱子

C.薏苡仁

D.槟榔

E.牵牛子

日照的测量方法包括（）.

A.烧痕法

B.散射辐射测量法

C.总辐射测量法

D.对比法

E.扫描法

某DNA片段的碱基序列为GCTACTAAGC，它的互补链顺序应为______。