【单选题】混凝土应具有一定得抗渗性、抗冻性、抗侵蚀性、抗冲耐磨性、抗风化性、抗碳化性等,统称为混凝土( )。
【判断题】Language has two levels: sound and meaning.
【简答题】眼睛的( )相当于光屏,近视眼用( )来矫正,远视眼用( )矫正。
【单选题】Peter is a brilliant language leaner. Within two weeks, he has developed a good _______ of Chinese and Japanese.
【简答题】A.It was stressful. B.It was peaceful. C.It was colorful. D.It was boring.
【简答题】A.It was rather boring. B.It was quite boring. C.It was interesting. D.It was really fun.
【简答题】A.It was burned down. B.It was robbed. C.It was blown up. D.It was closed down.
【单选题】Computer language has only two letters, what are they? ( )
【简答题】A.It was pretty good. B.It was rather dull. C.It was not well organized. D.It was attended by many people.