氢氧化铝与其他的氢氧化物不同,既能与酸反应生成盐和水,又能与碱反应生成盐和水,试

题型:填空题

问题:

氢氧化铝与其他的氢氧化物不同,既能与酸反应生成盐和水,又能与碱反应生成盐和水,试用离子方程式表示它与酸和碱反应的原理。

考点:单质铝铝盐(铝离子)氢氧化铝
题型:填空题

—How nice the building is! What is it used for?

—It             as a hotel. But I'm not sure. [ ]

A. must be used

B. is used

C. may be used

D. is using

题型:填空题

小儿从母体获得的抗体从何时起日渐消失()。

A.生后1~2个月

B.生后3~4个月

C.生后5~6个月

D.生后7~8个月

E.生后10~12个月

题型:填空题

注册工程师因()情形,所在单位应向注册管理机构办理注销。

A.脱离安全工作岗位连续满半年

B.不具有完全民事行为能力的

C.受刑事处罚的

D.严重违反职业道德的

E.同时在两个以上独立法人单位执业的

题型:填空题

At a certain time in our lives we consider every place as the possible sites(地点) for a house. I have thus searched the country within a dozen miles of where I live. In imagination I have bought all the farms, one after another, and I knew their prices.

The nearest thing that I came to actual ownership was when I bought the Hollowell place. But before the owner completed the sale with me, his wife changed her mind and wished to keep it, and he offered me additional dollars to return the farm to him. However, I let him keep the additional dollars and sold him the farm for just what I gave for it.

The real attractiong of the Hollowell farm to me were its position, being about two miles from the village, half a mile from the nearest neighbor, bounded(相邻) on one side by the river, and separated from the highway by a wide field. The poor condition fo the house and fences showed that it hadn’t been used for some time. I remembered from my earliest trip up the river that the house used to be hidden behind a forest area, and I was in a hurry to buy it before the owner finished getting out some rocks, cutting down the apples trees, and clearing away some young trees which had grown up in the fields. I wanted to buy it before he made any more of his improvements. But it turned out as I have said.

I was not really troubled by the loss. I had always had a garden, but I don’t thing I was ready for a large farm. I believe that as long as possible it is better to live free and uncommitted (无牵挂的). It makes but little difference whether you own a farm or not.

小题1:What do we know about the author?

A.He wanted to buy the oldest farm near where he lived.

B.He made a study of many farms before buying.

C.He made money by buying and selling farms.

D.He had the money to buy the best farm in the country.小题2:Why did the author decide to buy the Hollowell place?

A.It was of good market value.

B.It was next to the highway.

C.It was in a good position.

D.It was behind a nice garden.小题3:Why did the author want to buy the farm in a hurry?

A.He was afraid the owner might changes his mind.

B.He hoped to enlarge the forest on the farm.

C.He wanted to keep the farm as it was.

D.He was eager to become a farm owner.小题4:The underlined words “the loss” in the last paragraph refer to ___.

A.the money the author lost in buying the farm

B.the sale of the garden in the Hollowell place

C.the removal of the trees around the house

D.the failure to possess the Hollowell place小题5:What does the author believe as important in life?

A.To own a farm

B.To satisfy his needs

C.To be free from worries

D.To live in the countryside

题型:填空题

患者,女,35岁。上颌第一磨牙缺失,牙槽嵴条件良好,拟行种植修复。

此种植体与上颌第二磨牙之间距离均不能少于()

A.0.5mm

B.1.0mm

C.1.5mm

D.2.0mm

E.2.5mm

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