以下哪项不是常见的异常 * * 镜图像（） A.醋酸试验白色区域 B.碘试验褐区域 C.镶

下列各项中属于生物的是

A．电动狗

B．恐龙蛋化石

C．海葵

D．珊瑚的骨骼

If there are much more people in the world, there must have more food to feed the people. But food is already a problem in today world. One-third of the world's population is starving, because there is not enough food. Ten thousand people died of hunger every day in some parts of the world. But in others parts of the world, people become ill or die, because they eat too much food, and they are very fat. Some countries have no food, but the others have too much, and they throw them away. How can tomorrow's world feed its people? The world needs produce more food than it does now.

最大的人工电离辐射照射来源是（）

A.核能发电

B.核武器试验

C.核废料泄露

D.工厂作业

E.医疗照射

下列关于盐酸的叙述正确的是（　　）

A．盐酸有腐蚀性

B．浓盐酸在空气中会冒白烟

C．是浅黄色液体

D．盐酸就是液态氯化氢

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