观察下列几个装置示意图，有关叙述正确的是( ) A．装置①中阳极上析出红色固体

发布时间：2017-05-23 21:59 │ 来源：www.tikuol.com

题型：选择题

问题：

观察下列几个装置示意图，有关叙述正确的是( )

A．装置①中阳极上析出红色固体

B．装置②的待镀铁制品应与电源正极相连

C．装置③闭合电键后，外电路电子由a极流向b极

D．装置④的x电极是外接电源的正极

考点：金属的电化学腐蚀

题型：选择题

阅读下面的短文，从文后方框中选择恰当的句子填入文中空白处。

      When you read this sentence, the population of the earth has grown by 10 people. 1.________
      Most of these new people are born in developing countries. 2.________
      In the developed countries of Europe and North America, the population is growing very slowly. This is
because women in these countries have, on average (平均), only one or two children. 3.________
      In the developing countries, more than one billion people already live below the poverty line (贫困线).
      4.________ Children get little or no time at school and suffer from many kinds of diseases. The UN has
said that the world's population will reach 12.5 billion people by the year 2100. If the number makes your head
spinning (眩晕), you're not alone. Many experts are worrying that so fast population growth could have very
bad results. 5.________

A. These countries are found in much of Africa, South America and parts of Asia.
B. These people don't have enough food to eat and they live in poor housing.
C. That may not sound much, but it's about 14,000 people per hour.
D. But in the developing countries, many women have five or more children.
E. It could hurt the environment and increase the number of poor people.

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对不会说话的婴幼儿视力检查时，错误的是（）。

A.检查注视反射与跟随反射

B.遮盖试验

C.选择性观看法（PL）

D.视动性眼球震颤法（OKN）

E.形象视力表

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简述班级授课制的特点?

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导致黄斑前膜发生的可能原因有（）

A.视网膜脱离外垫压术

B.糖尿病视网膜病变PRP术后

C.玻璃体积血

D.眼内炎

E.视网膜血管炎

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题型：选择题

真菌培养的最适pH为（）

A.2.0～4.0

B.2.5～4.5

C.3.0～5.0

D.3.5～5.5

E.4.0～6.0

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