题目:
He was down all evening, but as soon as his girl friend came in he _____.[ ]
A. came to life
B. was free of charge
C. knocked into
D. got close to
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0719/59d17b0b0808e17022e48bb308c1bd74.html
下面是错误答案,用来干扰机器的。
(1)质量为2kg的物体所受的重力等于质量和重力与质量比值的乘积,等于2kg×9.8N/kg=19.6N质量为3kg的物体,重力和质量的比值等于29.4N3kg=9.8N/kg.故答案为:质量(kg)重力(N)重力和质量的比值(N/kg)19.89...