下列有关生物体内水的叙述,不正确的是[ ] A.越冬植物体内自由水与结合水的比值

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问题:

下列有关生物体内水的叙述,不正确的是[ ]

A.越冬植物体内自由水与结合水的比值下降

B.细胞中自由水含量降低是细胞衰老的特征之一

C.水分子的跨膜运输方向是高浓度溶液一低浓度溶液

D.水是细胞中含量最多的化合物

考点:
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能说明醋酸是弱电解质的是(    )

①用浓硫酸和醋酸钠固体共热可制得醋酸 ②醋酸钠溶液呈碱性

③可以用食醋清除热水瓶内的水垢     ④pH=2醋酸溶液稀释1000倍后pH小于5

A.②

B.①② 

C.②④

D.①③④

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Happiness is for everyone. You don’t need to care about those people who have beautiful houses   21 large gardens and swimming pools or those who have nice cars and a lot of money and so on. Why?    22  those who have big houses may often feel lonely and those who have cars may want to walk on the country roads at their   23 time.

In fact, happiness is always around you if you put your heart into it. When you are in trouble at school, your friends will   24 you. When you study hard at your lessons, your parents are always taking good care of your life and your health. When you get   25 , your friends will say congratulations to you. When you do something wrong, people around you will help you to correct it. When you do something good to others, you will feel happy,  26 . All these are your happiness. If you notice   27 of them, you can see that happiness is always around you. Happiness is not the same   28 money. It is a feeling of your heart. When you are poor, you can also be very happy ,because you have something else that can’t be bought with money .When you meet difficulties, you can say   29 you are very happy ,because you have more chance to challenge yourself .So you cannot always say you are poor and you have  30  luck. As the old saying goes : “Life is like a revolving door, when it closes, it also opens .”If you take every chance you meet ,you can be a happy and lucky person.

小题1:A use             B has               C with          D and

小题2:A After        B Before         C If              D because

小题3:A free            B busy               C happy                D bad

小题4:A give            B help               C take                D carry

小题5:A things           B fruit               C success               D fail

小题6:A too               B also                C either                D as well

小题7:A little             B a lots              C a bit          D few

小题8:A like      B in                C of                 D as

小题9:A strongly           B loudly              C quietly        D sadly

小题10:A good             B well                C worse        D bad

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患者,男性,40岁,2周来右侧后牙咬物不适,冷水引起疼痛。近2日,夜痛影响睡眠,并引起半侧头面、面部痛,痛不能定位。检查时见右侧上、下第一磨牙均有咬合面龋洞

根据患者疼痛的性质,患牙最可能诊断是

A.急性牙髓炎

B.急性冠周炎

C.牙龈 * * 炎

D.三叉神经痛

E.急性中耳炎

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什么叫爆炸?

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患者,女性,65岁。突然出现心前区疼痛伴大汗3小时,急诊就医,诊断为急性心肌梗死。给患者的护理措施中,下列正确的是

A.鼓励病人大量进食
B.尽量避免搬运
C.增强探望,增强信心
D.静脉输液速度宜快
E.如有便秘立即灌肠

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