意大利传教士利马窦（1552―1610）向明朝皇帝进贡的《坤舆万国全图》。该图绘制时

（）是同一花中雄蕊花粉传到雌蕊柱头上的授粉方式，这类作物叫自花授粉作物（或自交作物）。

胶原蛋白主要位于真皮，可占皮肤干重的（）。

A.50％

B.60％

C.75％

D.30％

E.40％

统计方法是以（）来解释规律的方法。

This dictionary tells you about English words and how to use them in reading, writing and speaking English. It not only gives the meaning of words, it can also help you with spelling, word-building, grammar and pronunciation.

To use your dictionary correctly, you need to understand how the dictionary works. At the front of the book, you will find some exercises to help you make the most use of your dictionary.

If you look up the word “colour”, you will find two spellings for this word. “Colour” is used in British English, while “color” is used in American English. When there are differences between British and American spelling, the dictionary shows it with the word “BrE” for British English and “AmE” for American English.

The dictionary also helps you pronounce words correctly. We use a special alphabet (特殊字母) to show pronunciation. If you turn to the inside back face, you will see all the phonetic letters (音标) with some words to show you how they are pronounced. Just look at the inside back cover when you’re not sure how to say a word.

The most important reason for using a dictionary is to find out the meaning of a word—its definition

In this dictionary, the definitions have been written using only 2000 words. This means that the definitions of even the most difficult words are simply explained and easy to understand.

When a word has more than one meaning, read all the meanings until you find the one that correctly tells the use of the word you are looking for.

Most of the words in this dictionary can be used by people in all parts of the world.

小题1:The AmE spelling of the Chinese word “颜色” in this dictionary is ________.

A．colour

B．colar

C．color

D．corner小题2:The phonetic alphabet help you ________ each word correctly.

A．understand

B．write

C．say

D．know小题3:The underlined word ‘definition’ means__________

A．词性

B．词条

C．词义

D．词库小题4:The dictionary explains ________.

A．some of the difficult words

B．all the words in the dictionary in a simple way

C．all easy words

D．the words with two meanings

一项考古统计表明，我国新石器时代稻谷遗存120余处，其中长江流域90余处，黄河流域12处，另有闽、浙、台数处。炭化粟粒、粟壳遗存40余处，分布于山东、河北、浙江、新疆等省区。据此可以推断（）

①我国已由采集进入种植的时代

②我国的原始农业南北各具特色

③南北之间粮食品种已有交流

④我国北方种植粮食早于南方

A.①③

B.①②③

C.②④

D.①②④