问题
选择题
人呼出的气体与吸入的气体比较[ ]
A．氧气增多，二氧化碳减少
B．氧气减少，二氧化碳减少
C．氧气增多，二氧化碳增多
D．氧气减少，二氧化碳增多
答案
答案：D
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人呼出的气体与吸入的气体比较[ ]
A．氧气增多，二氧化碳减少
B．氧气减少，二氧化碳减少
C．氧气增多，二氧化碳增多
D．氧气减少，二氧化碳增多
答案：D
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| Li Lei gets an e-mail __1__ Jackson Wilson. Jack is a high school student in Canada. He wants to __2__Chinese. Dear friend, My name is Jack Wilson. I am from Toronto, __3__. I am 13 years old. I'm a schoolboy. I know China is a great __4__. I want to __5__ friends in China and I want to learn Chinese. There are nineteen students in __6__ class. My classmates are from six countries. They are learning English. My parents are from France. They __7__ French. I speak English and French. There are many Chinese __8__ in Toronto. I want to learn Chinese, __9__ I don't have any Chinese textbooks. Could you __10__ me? Please write back soon. Thank you. Jack Wilson | |||
| ( ) 1. A. for ( ) 2. A. teach ( ) 3. A. Canada ( ) 4. A. city ( ) 5. A. have ( ) 6. A. his ( ) 7. A. speak ( ) 8. A. there ( ) 9. A. so ( ) 10. A. give | B. to B. study B. Japan B. country B. take B. your B. tell B. here B. and B. help | C. from C. speak C. Australia C. people C. give C. my C. say C. peoples C. for C. write | D. of D. know D. France D. school D. make D. their D. talk D. student D. but D. leave |