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完形填空。 In the world today, all of the people need recreation (消遣). We 1 work all the time if we are going to keep healthy and enjoy life. Everyone has his own way of 2 . Perhaps one of the most popular forms 3 to take part in sports. There are team sports, such as basketball and football. There are 4 individual (各人的) sports, such as swimming and running. Skating and mountain climbing are the most popular forms of recreation for people who 5 to be outdoor. Not everyone who enjoys 6 likes to take part in them. Many people like 7 them on TV or listening them on the radio. So many people like some forms of 8 recreation, such as watching TV, singing and dancing. It doesn't matter 9 we like indoor recreation or take part in outdoor sports. It is important for everyone to 10 from time to time, and enjoy some forms of recreation. (     )1. A. can (     )2. A. retiring (     )3. A. is (     )4. A. too (     )5. A. hate (     )6. A. culture (     )7. A. looking at (     )8. A. online (     )9. A. that (     )10. A. relax B. can't B. living B. are B. also B. dislike B. practice B. seeing B. worldwide B. whether B. work C. must C. sighting C. was C. even C. like C. sports C. watching C. outdoor C. when C. study D. wouldn't D. relaxing D. were D. ever D. follow D. programs D. checking D. indoor D. although D. dream
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【简答题】【化学——选修2:化学与技术】(15分)碳酸锂用途广泛,可用作陶瓷、药物、催化剂,也是常用的锂离子电池的原料。工业上以锂辉石(Li 2 O·Al 2 O 3 ·4SiO 2 ,含少量Ca、Mg元素)为原料生产碳酸锂。其部分工艺流程如下: 已知:①Li 2 O·Al 2 O 3 ·4SiO 2 +H 2 SO 4 (浓) Li 2 SO 4 +Al 2 O 3 ·H 2 O↓ ②某些物质的溶解度(S...
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3-羟基与17位羟基保持同平面
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可用于治疗卵巢功能不全引起的病症
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是存在于女性体内的雌激素
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是非甾类雌激素
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A.
机器语言
B.
汇编语言
C.
高级语言
D.
以不都不是
【简答题】工业上以锂辉石(Li 2 O·Al 2 O 3 ·4SiO 2 ,含少量Ca、Mg元素)为原料生产碳酸锂的部分工艺流程如下 已知: ①Li 2 O·Al 2 O 3 ·4SiO 2 +H 2 SO 4 (浓) Li 2 SO 4 +Al 2 O 3 ·4SiO 2 ·H 2 O↓ ②某些物质的溶解度(S)如下表所示。 (1)从滤渣1中分离出Al 2 O 3 的一种方法为:在滤渣中加入适量盐酸,过滤...
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A.
正确
B.
错误
【单选题】Python 语言属于( )语言
A.
机器语言
B.
汇编语言
C.
高级语言
D.
以上都不是
【判断题】合理的数据也可能不靠谱
A.
正确
B.
错误
【单选题】下列哪一项不属于抑郁产生的原因( )
A.
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B.
早期的经历
C.
错误的思维方式
D.
乐观的心境
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【单选题】向 H 2 S 水溶液中加入一些 Na 2 S 固体 , 将使 。
A.
H 2 S 的 解离度增大
B.
H 2 S 的 解离常数减小
C.
溶液的 pH 值下降
D.
溶液的 pH 值增大
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