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【单选题】
同属于物理与化学配伍变化现象的是A.
潮解、液化与结块
B.
产生沉淀
C.
变色
D.
产气
E.
变大
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皮皮学刷刷变学霸
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【简答题】(2019·广西柳州一模)下列有关细胞结构和功能的叙述,正确的是( )A. 中心体和线粒体中均含有核酸 B. 葡萄糖在线粒体中分解为CO 2 和H 2 O C. 内质网膜和高尔基体膜都具有流动性 D. 溶酶体能合成和分泌多种酸性水解酶 2.(2018·江苏盐城测试)用差速离心法分离出某植物细胞的3种细胞器,经测定其中3种有机物的含量如图所示。下列叙述正确的是( ) A.细胞器甲一定是有氧呼吸的主要...
【单选题】— What’s the trouble with Tim? — .
A.
He is writing letters
B.
He has a bad cold
C.
He has long curly hair
D.
He should lie down and rest
【单选题】It's raining heavily outside. He has to stay at home, ______? [ ]
A.
has he
B.
hasn't he
C.
does he
D.
doesn't he
【单选题】He has never been to Hong Kong before, has he? ________. It's the third time that he's been there.
A.
Yes, he has
B.
No, he has
C.
Yes, he hasn't
D.
No, he hasn't
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