表示水中全部有机物含碳总量的指标是（） A.DO B.COD C.BOD D.TOC 发布时间：2017-05-16 17:45 │ 来源：www.tikuol.com 题型：单项选择题 B型题 问题： 表示水中全部有机物含碳总量的指标是（）A.DOB.CODC.BODD.TOCE.TOD
题型：单项选择题 B型题 完形填空。 As we know,there__1__ four seasons in China . It's __2__ in spring(春), hot in __3__ , cool in autumn (秋) and cold in __4__ . My __5__ season is winter. Sometimes it snows (下雪). Everything is all white. The world __6__ clean and fresh (新鲜). I can go skating then. But Kitty likes summer__7__ than winter. She says summer is __8__ for sports. She can go__9__ , sometimes in a lake and sometimes in a river. She __10__ it very much .( ) 1. A. have ( ) 2. A. warm ( ) 3. A. spring ( ) 4. A. spring ( ) 5. A. best ( ) 6. A. looks ( ) 7. A. good ( ) 8. A. bad ( ) 9. A. swiming ( ) 10. A. enjoy B. is B. cool B. summer B. summer B. better B. watches B. well B. good B. swim B. enjoys C. are C. cold C. autumn C. autumn C. like best C. sees C. better C. well C. to swim C. wants D. be D. hot D. winter D. winter D. favourite D. looks at D. best D. very D. swimming D. like 查看答案
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