“十年树木,百年树人”出自谁的名言()
A、管仲
B、孟子
C、孔子
参考答案:A
A certain lab experiments with white and brown mice only. In one experiment, 2/3 of the mice are white. If there are 13 brown mice in the experiment, how many mice in total are in the experiment ?()
A. 39
B. 33
C. 26
D. 21
E. 10
电气隔离是采用变压比为1:1的隔离变压器实现工作回路与其它电气回路的()。
A、相连
B、隔离
C、联系