In certain area, during certain period, the development of communication could ______ the

In order to ensure the safety of the ship and its equipment during UMS operation, certain

His words,______, are right.A．in a certain extentB．to a certain extentC．I wonderD．everyone

If there are more animals in a certain area than______ to support them, some of the animal

共用题干1.Certainly no creature in the sea is odder t

共用题干1.Certainly no creature in the sea is odder t

The atmosphere certain gases mixed together in d