Today he is capable of making scientific __________ of natural __________. A: analysises; phenomena B: analyses; phenomenon C: analyses; phenomena D: analyses; phenomenas

_________Phenomena fundamentally change the world around us.

The main causes of this phenomena ____________ the factors of profit. （在于）

Which of the phenomena may not occur if there is an energy crisis?

There is no doubt that these phenomena are shocking and should arouse our social concern.

A．difficultiesB．phenomenaC．problemsD．situations A: difficulties B: phenomena C: problems D: situations

Some phenomena related to grass are often used to describe the transiency of human life.

中国大学MOOC: Which of the following phenomena can be said to be the performance of the Dao?

中国大学MOOC: According to Laozi, all the phenomena in nature occur _________ and naturally.

Scientists are always studying the ______ of nature. A: phenomenons B: phenomenon C: phenomenas D: phenomena