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问题 单项选择题

下列因素中与矽肺发病直接相关的是（）。

A.结晶型二氧化硅

B.二氧化硅含量

C.上述粉尘浓度

D.上述粉尘分散度

E.接触上述粉尘的时间

答案

参考答案：B

问答题

ABC Limited is registered with an authorised share capital of Eur5,000 and an issued share capital of Eur1,300, fully paid up.Required:

(a) Distinguish between the authorised and issued share capital of a company and identify the minimum capital requirements at law for a private company. (4 marks)
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单项选择题

龛影的主要X线表现是（）.

A.圆形钡斑

B.钡斑周围环绕透明带

C.胃黏膜溃烂

D.向腔外突出的钡斑阴影

E.胃壁僵直
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