单项选择题
A.一般来说,它最好将重心放在讲解的内容上,使之成为吸引观众注意力的方式。 B.一般的规则是,它最好集中在礼物的内容上,这比吸引观众的注意力更好。 C.一般的规则是,它最好注重讲解的内容,这意味着可吸引到观众的注意力。 D.总的说来,最好把重点放在讲解的内容上,借此来吸引观众的注意。
A.Colleges may take different policies in online courses. B.Some schools allow students to mix online and face-to-face credits. C.Students choose online courses for different purposes. D.Online courses are much easier to pass than traditional cours
A.He. has a ear, air conditioning, a refrigerator and a microwave. B.He has two color televisions and cable or satellite TV reception. C.His house is not very crowded. D.He provides enough money to satisfy all the needs for the whole family.