三角形的高扩大2倍,面积也扩大2倍.______.(判断对错)
因为三角形的面积=底×高÷2,
底一定,高扩大2倍,面积也会扩大2倍;
所以题干没有说明底不变.
故答案为:错误.
—Zhao Benshan's sketch(小品)at the Spring Festival Gala once again won the first prize.
—Yes. ________. [ ]
A. That's quite something
B. It's back in the news
C. You can't be serious
D. That sounds fine
除盐水处理系统的中和池,其作用是()。
A、收集废水;
B、节约用水;
C、中和废酸碱液;
D、沉淀。