【判断题】系统默认情况下,坐标系为世界坐标系 (WCS) 。
【单选题】There are about _____ in our school. [ ]
D.
two thousands students
【单选题】There are ______ girls in my school. [ ]
【单选题】现阶段船舶柴油机的最低配桨转速达到______。
【单选题】There are people in the cinema. A. two hundred B. two hundreds C. two hundred of
【单选题】—________ there two books on the desk? —Yes, ________ are. [ ]