Kerley A线位于() A.上肺内侧 B.上肺外周 C.中肺 D.下肺内侧 E.

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问题:

Kerley A线位于()

A.上肺内侧

B.上肺外周

C.中肺

D.下肺内侧

E.下肺外周

考点:江苏住院医师内科Ⅰ阶段影像放射科影像放射科题库
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如图所示是一个通电螺线管,闭合电键后螺线管旁的小磁针a静止时的情况如图所示(小磁针a涂黑的一端是N极),试在图中标出通电螺线管中小磁针b的N,S极和电源的“+”、-”极.

题型:单项选择题

It is said that another acre of the world’s forest will be destroyed forever. Why is this happening? There are two reasons — land and wood. In many countries the trees have been cut down because the land was needed for animals or crops. In other parts of the world the trees are cut down because their wood is wanted. This wood is used by local people for firewood or it is used for building. But many people don’t know that in most places the trees won’t be replaced. The soil in the forests is very thin, but it is protected by the trees. When the trees are cut down, the soil is washed away by the rain or blown away by the wind. Soon nothing can be grown on it. The  forest becomes a desert. Then more land will be needed, and more trees will be cut down.

When the forest is destroyed, it isn’t only the trees that are lost — the homes of millions of animals and plants are destroyed, too. All kinds of animals are in danger — fish,reptiles, birds, mammals, insects, and shellfish — as well as thousands of plants.

Who is to blame for this? The answer is simple: all of us. There are just too many people in the world. The world’s population is now six billion. Of course, it’s very easy to blame the local people. We don’t cut down trees. They do. But the products are bought by people like you and me — wood houses, beds, tables, chairs, paper… Why are the forests being destroyed? Just look around. You are probably using it right now.

小题1:People cut down large areas of trees in order to _________.

A.grow crops

B.keep animals

C.build houses

D.get land and wood小题2: In most places, __________after trees are cut down.

A.new trees can grow better

B.forests will become deserts

C.most animals can live there

D.people build new house there小题3: According to the passage, we should  _________________ to protect the forest.

A.use fewer wood products

B.plant more trees

C.blame the local people

D.protect the soil

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甲状腺素使基础体温随月经周期变化。

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下列微粒中半径最小的是(    )

A.Na

B.Na+

C.Mg2+

D.K

题型:单项选择题

分别取1 mol葡萄糖进行下列实验:  

(1)银镜反应时,生成Ag的物质的量为_______mol,反应后葡萄糖变为___________,其结构简式是______________。   

(2)与乙酸反应生成酯,从理论上讲完全酯化需要________g 乙酸。   

(3)若使之完全转化为CO2和H2O,所需氧气的体积在标准状况下为_______________L,反应的化学方程式是_______________。

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