下列四个图象，分别对应下列四种实验操作过程，其中正确的是（ _爱下问搜题

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问题选择题

下列四个图象，分别对应下列四种实验操作过程，其中正确的是（　　）

A．测定不同温度下氯化钠的溶解度

B．某温度下，向接近饱和的氯化铵溶液中加入氯化铵晶体

C．向氯化铁和盐酸的混合溶液中加入过量氢氧化钠溶液

D．向两份同体积和相同质量分数的盐酸溶液中分别加入足量的铁粉和镁粉

答案

A、氯化钠的溶解度受温度的影响的变化不大，故图象与实验操作过程不对应．

B、接近饱和的氯化铵溶液加入氯化铵会溶解，溶质的质量分数会增大，但当达到饱和时就不再溶解了，溶质的质量分数也就不变了；图象应该是先上升后成一条水平直线，故图象与实验操作过程不对应．

C、向氯化铁和盐酸酸的混合溶液中加入过量氢氧化钠溶液时，先与盐酸反应，开始时不会生成沉淀，盐酸消耗完再与氯化铁反应会生成氢氧化铁沉淀，故沉淀的量先是零，在不断上升，最后形成一条水平直线；故图象与实验操作过程对应．

D、金属与酸反应时氢气来源于酸中的氢元素，因为酸的量相同，金属过量，故生成的氢气应该相等，镁的活动性比铁强，故反应速率快，反应时间短；故图象与实验操作过程不对应．

故选C．

完形填空

Elizabeth lived on the other side of a valley. One winter there was a very big flood, and a lot of houses down below Elizabeth’s were washed away. Elizabeth’s house was 21 enough to escape the flood, so when the water 22 and the other houses were standing there with no 23 and no walls and all covered with 24 ,her house was still quite all right.
Her house was quite small, her husband was 25 and she had six children to support. Ten dollars a week, which was the total of their income, didn’t leave much for 26 . Expenses were always greater than Elizabeth had 27 , but she didn’t hesitate to help one of the families that lost everything i

n the flood and she 28 her house with them until it was 29 for them to move into their own houses.
Elizabeth’s friend was very 30 when she saw Elizabeth do this. She couldn’t understand why Elizabeth wanted to give 31 so much work and trouble to help others.
“Well,” Elizabeth 32 to her friend, “at the end of the First World War, a woman in the town where I then lived found herself 33 , because her husband had been killed in the war in Germany and she had a lot of 34 , as I have now.”
“The day before Christmas, this woman said to her children, ‘We won’t be able to have 35 presents for all of us. I’ll go and get it.’ She came back with a little girl who was in 36 clothes and crying in deep sorrow. The girl was an orphan(孤儿). ‘Here’s our 37 . She said to the children.
“The children were very 38 to have such a present. They 39 the little girl, and she grew up as their sister. I was that 40 present.”

C．disappeared

C．her children

D．disappointed

D．Thanksgiving

单项选择题

患者男性，34岁。饮酒后上腹部剧烈疼痛，伴呕吐、高热1天入院。查体：体温39.8℃，上腹部压痛明显。查血示白细胞计数明显升高，血清淀粉酶升高。

护士对患者进行饮食指导，正确的是

A．禁食水
B．低脂、流质饮食
C．低蛋白、流质饮食
D．低脂、半流食
E．高热量、高蛋白、软食