用铝箔包装0.1mol金属钠，用针扎一些小孔，放入水中，完全反应后，用排水取气法收集产生的气体，则收

下列关于论文答辩中不正确的是()。

A.宣读论文全文

B.从容

C.回答问题简明扼要

D.携带论文与参考资料

请帮忙给出正确答案和分析，谢谢！

In this crisis, how many people were killed in Nairobi？

A．About 30.

B．More than 300.

C．Around 3, 000.

D．More than 5, 000.

请帮忙给出正确答案和分析，谢谢！

教育的本质属性是(()，即教育是一种培养人的社会实际活动,。

A.教学

B.教法

C.育人

D.育德

请帮忙给出正确答案和分析，谢谢！

The news item is mainly about______.

A．east Africa"s biggest economy

B．the openness of the mining industry in Kenya

C．discoveries of rare minerals in the Mrima Hills

D．new discoveries of mineral wealth in Kenya

请帮忙给出正确答案和分析，谢谢！

According to the passage, what must the listeners do on their own？

A．Move into their dormitories.

B．Find their classrooms.

C．Memorize campus landmarks.

D．Complete their registration materials.

请帮忙给出正确答案和分析，谢谢！