A.带电体所带的电荷量可以是任意值
B.卡文迪许建立了库仑定律
C.物体所带电荷量的最小值是1.6×10-19C
D.元电荷实质就是电子(或质子)本身
答案:C
________ the plan has been made, let's get down to ________ it out.
A.Now that; carry
B.Because; carry
C.Since; carrying
D.Now; putting
地板辐射采暖系统中混凝土填充层的养护周期应不小于()h。
A.24
B.48
C.36
D.72