滴定时,为什么每次都从0.00ml或接近零的某刻度开始最好?
参考答案:
这样可固定在某一段体积范围内滴定,减少测量误差。
----Can you persuade him to take me along? ----_______. I’m not sure.
A.It doesn’t matter
B.It all depends
C.It is a piece of cake
D.That looks at things
变频器安装场所的周围振动加速度应不小于()g。