直线 AB 的两端点只有 X 坐标不同,则 A 、 B 是 面的重影点(选填 V 、H、 W ) ; 直线 AB 的两端点只有 Y 坐标不同,则 A 、 B 是 面的重影点(选填 V 、H、 W ) ; 直线 AB 的两端点只有 Z 坐标不同,则 A 、 B 是 面的重影点(选填 V 、H、 W ) ;
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举一反三
【单选题】Children and Parents Do parents owe their children something? Yes, they owe them a great deal. One of their chief obligations is to give their children a sense of personal worth, for self-esteem is th...
A.
tell the child that other children are doing much better than him/her
B.
remind the child that he/she is not bright
C.
tell the child he/she is just a grass that people won't notice