用分子的相关知识解释下列生活中的现象,其中错误的是[ ] A.热胀冷缩,说明分子

题型:选择题

问题:

用分子的相关知识解释下列生活中的现象,其中错误的是[ ]

A.热胀冷缩,说明分子的大小随温度升降而改娈

B.“酒香不怕巷子深”,说明分子在不停地运动

C.10mL酒精和10mL水混合后,体积小于20mL,说明分子间有空隙

D.湿衣服在夏天比冬天容易晾干,说明分子的运动速率随温度升高而加快

考点:分子的特点
题型:选择题

Mark T or F. 判断下面的句子意思是否与短文内容相符 。

     Daming and Bill are students of Beijing University. They study science in the same class. They help each

other at work in the labs (实验室) and they are friends in their free time.

     Daming and Bill have different hobbies. Daming's hobby is reading books and he has a lot of books in his

room. Bill likes sports and his favourite sport is basketball. Daming can cook different kinds of Chinese food.

Bill cannot cook at all but he likes eating Chinese food very much. So he often visits Daming and Daming

cooks nice Chinese food for him. Sometimes Bill asks Daming to the restaurant to eat western food.

( )1. Daming and Bill study in the same university.

( )2. Bill is studying Chinese in Beijing.

( )3. Daming likes sports but Bill doesn't.

( )4. Both Daming and Bill like cooking Chinese food.

( )5. Sometimes Bill cooks western food for Daming.

题型:选择题

(2012•台州)实验操作要规范,否则会影响实验效果,甚至可能发生事故.如图所示的两种错误操作,都会引起试管破裂.

(1)图甲中,加热固体药品时试管口高于试管底,试管口的冷凝水在   作用下会流到试管底.

(2)图乙中,用排水法收集气体后,未将导管从水槽中取出就撤去酒精灯,水槽中的水在

   作用下会流入试管.

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洪明在银行门口捡到一张5万元的银行本票,欣喜之余决定将该本票背书转让给邻居金贵,清偿其所欠借款,洪明对金贵隐瞒了捡到本票的事实。请问以下关于本票权利的取得哪一项表述是正确的?()

A.洪明能够取得票据权利,金贵也能取得票据权利

B.洪明能够取得票据权利,金贵不能取得票据权利

C.洪明不能取得票据权利,金贵能取得票据权利

D.洪明不能取得票据权利,金贵也不能取得票据权利

题型:选择题

某企业账面反映长期借款200万元,应付长期债券250万元,普通股250万元,保留盈余300万元其资金成本分别为6.7%、9.17%、11.26%、11%,则该企业的加权平均资金成本为()。

A.14.38%

B.11%

C.10.09%

D.9.75%

题型:选择题

某3岁小儿接种乙脑疫苗,5min后突然出现烦躁不安,面色苍白,口周发青,四肢湿冷,呼吸困难,脉细弱,应考虑

A.接种后局部反应
B.接种后全身反应
C.接种后局部强反应
D.接种后局部中等反应
E.接种后过敏性休克

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