What can we learn from the visual aid?() A: Each team creates a visual aid to show their language ability. B: The visual is a house. C: The visual includes a roof and a wall. D: Students use the visual aid to answer argument.

中国大学MOOC:"The pictures or video clips that are used as visual aids can be sometimes irrelevant to the presentation topic.";

Visual aids can help enhance your credibility as a speaker. ()

The method that can be used in vocabulary teaching is (). A: Visual method B: Definition method C: Contrast method D: Above all

Which of the following expressions is correct? A: Carbonaceous materials are the most widely used cathodes because they are non-toxic and provide good stability. B: Carbonaceous materials are the most widely used cathodes because they are non-toxicity and good stability. C: Carbonaceous materials are the most widely used cathodes due to their non-toxicity and high stability. D: Carbonaceous materials are the most widely used cathodes due to non-toxic and highly stable.