室温时,向饱和石灰水中加入少量生石灰并恢复到原来的温度.下列说法正确的是( )

题型:选择题

问题:

室温时,向饱和石灰水中加入少量生石灰并恢复到原来的温度.下列说法正确的是(  )

A.溶液中溶质的质量减少

B.溶液中溶质的质量分数增大

C.溶液的碱性增强

D.Ca(OH)2的溶解度增大

考点:关于溶液的计算固体溶解度溶液的定义、组成及特征生石灰的性质和用途
题型:选择题

性传播疾病的主要传播方式是()。

A.性接触

B.医源性感染

C.血液传播

D.间接接触

E.垂直传播

题型:选择题

Are you a man or a mouse When people ask this question they want to know (1) you think you are a (2) person or a coward. But you will never really know the answer to this question (3) you are tested in real life. Some people (4) they are brave but when they come face to face with real (5) , they act like cowards. Others think of themselves as cowards, but when they meet danger, they act like (6) .Lenny had always thought of himself as a (7) person. He got worried before examinations. He worried about his job and health. All he wanted in life was to be safe and healthy. (8) , on January 15th, 2002, a plane crashed into the Potomac River in Washington. Lenny went to the river to See what was happening. He saw a woman in the (9) water. Lenny did not feel afraid. He kept very (10) and did a very dangerous thing. He jumped into the Potomac, (11) to the woman, and kept her head (12) the water. Seventy-eight people died that day. Thanks to Lenny, it was not (13) .When you are in a very (14) situation and feel afraid, the body automatically produces a chemical in the blood. The chemical is called adrenalin. (15) adrenalin in the blood system, you actually feel per and per and are (16) to fight or run away. However, when you are absolutely terrified, the body can produce too much adrenalin. Where this (17) , the muscles become very hard and you find you (18) move at all. You are then paralyzed with fear. This is (19) when we are very frightened, we sometimes say we’re "petrified". This word comes from the Greek word "petros", which means "stone". We are (20) frightened that we become stonelike.

第(1)空应选择()

A.how

B.neither

C.whether

D.either

题型:选择题

十二指球部溃疡()
幽门管溃疡的临床表现()

A.多为上腹正中或偏右节律性疼痛

B.多为剑突下正中或偏左节律性疼痛

C.上腹疼痛无典型节律性,呕吐多见

D.上腹持续性剧烈疼痛

E.右上腹节律性疼痛,夜间痛和背痛多见且突出

题型:选择题

稀粥xī zhōu

题型:选择题

出租汽车驾驶员在运营过程中产生的路桥通行费应该由驾驶员承担。

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