下面是菜豆种子的结构及其萌发后的幼苗示意图，请据图回答：

问题解答题

（1）幼苗的A是由种子的[______]______发育来的，C是由种子的[______]______发育来的，D是种子结构中的[______]______．

（2）在种子萌发成幼苗的过程中，[4]的作用是______．

（3）种子萌发成幼苗的过程就是细胞数目不断增多和细胞不断分化的过程，在菜豆种子中[______]部位的细胞具有分裂能力．

答案

答：在图中，1是胚轴发育成B连接根和茎的部位，2为胚芽发育成A茎和叶，3为胚根发育成C根，4是子叶其营养物质溶于水转运给胚，5是种皮其保护作用；

（1）种子的2为胚芽发育成A茎和叶，3为胚根发育成C根，4是子叶其营养物质溶于水转运给胚．

（2）子叶的作用就是营养物质溶于水转运给胚．

（3）胚根发育成根，细胞具有分裂和分化的能力；胚轴发育成连接根和茎的那部分，其细胞也具有分裂能力；胚芽发育成芽其细胞也具有分裂的能力．

故答案为：（1）2；胚芽；3；胚根；4；子叶

（2）营养物质溶于水转运给胚

（3）1、2、3

完形填空。
Body language is used by people for sending messages to one another. It is very __1__ because it can help you make yourself easily understood when you are talking with others; you are not just using words, but also using expressions and __2__ . For example, waving one's hand is to say" Good-bye" . Shaking hands means welcome, and clapping hands __3__ congratulations. Nodding the head means agreement, but shaking the head means disagreement. The gestures are __4__ both by the Chinese and foreigners as having __5__ same meanings. Different countries have different body language. For example, when in Russia, France and Arab people kiss each other when they meet, but men in China or Australia shake hands __6__ kissing. People in Puerto Rico like touching each other, but people in Britain do not touch each other. People in Arab like standing __7__ one another when they are talking, __8__ English people must keep a distance __9__ when they are talking. When you use a foreign language it is very important to know the meanings of gestures and movements in the foreign country. __10__ the customs will help you communicate with people and make you stay there much more pleased and comfortable.
( ) 1. A. helpful ( ) 2. A. words ( ) 3. A. to mean ( ) 4. A. received ( ) 5. A. a ( ) 6. A. instead of ( ) 7. A. nearly ( ) 8. A. and ( ) 9. A. from ( ) 10. A. Taking	B. difficult B. gestures B. mean B. accepted B. as B. stand for B. far away B. or B. of B. Refusing	C. easy C. handshake C. means C. receiving C. / C. such as C. close to C. but C. to C. Following	D. useless D. idioms D. meaning D. accepting D. the D. compared to D. side by side D. however D. away D. Saying