由两点的坐标值判定空间两点的相对位置的方法正确的是:
A.比较两点的x值大小,x值大的点在左
B.比较两点的x值大小,x值大的点在右
C.比较两点的y值大小,y值大的点在前
D.比较两点的y值大小,y值大的点在后
E.比较两点的z值大小,z值大的点在上。
--Tom is always making so many mistakes in his English exercises!--Yeah. If he __________ more careful, he________fewer mistakes.
A. was; will make
B. is; would make
C. were; will make
D. were; would make
If I_____ you, I ________ the army.
A. am; would join
B. were; would join
C. am; will join
D. were; will join
乒乓球正手平击发球,挥拍击球( ),顺势还原。
A. 中下部
B. 中上部
C. 中部
D. 下部