下列说法正确的是() A.(NH4)2SO4溶液能使蛋白质变性 B.分子式为C

题型:选择题

问题:

下列说法正确的是(     )

A.(NH4)2SO4溶液能使蛋白质变性

B.分子式为C2H4O2的有机物不一定是羧酸

C.煤的干馏是物理变化,煤的气化和液化是化学变化

D.纤维素、蛋白质、油脂、葡萄糖在一定条件下都能发生水解反应

考点:新型材料(新型陶瓷、单晶硅等)生活中的其他材料及应用(纳米材料、功能高分子材料等)
题型:选择题

在小树上拴铁丝,天长日久会形成节瘤,是由于(  )被破坏.

A.木质部

B.韧皮部

C.形成层

D.表皮

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Our teachers think Jim the best student. The sentence structure is _______

A.S+V+DO

B.S+V

C.S+V+P

D.S+V+DO+OC

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《蝶恋花》(“百尺朱楼临大道”)中最为悲观的词句是()

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Sometimes we have specific problems with our mother; sometimes, life with her can just be hard work. If there are difficulties in your (1) , it’s best to deal with them, (2) remember that any (3) should be done (4) person or by letter. The telephone is not a good (5) because it is too easy (6) either side to (7) the conversation.

Explain to her (8) you find difficult in your relationship and then (9) some new arrangements that you think would establish a (10) balance between you. Sometimes we hold (11) from establishing such boundaries because we are afraid that doing (12) implies we are (13) her. We need to remember that being (14) from our mother does not (15) mean that we no longer love her. If the conflict is (16) and you cannot find a way to (17) it, you might decide to give up your relationship with your mother for a while. Some of my patients had (18) "trial separations". The (19) allowed things to simmer down, enabling (20) .

17()

A.shape

B.resolve

C.simulate

D.grind

题型:选择题

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