小明测量食用油密度步骤如下：①将天平放在水平桌面，游码归零，指针静止时指向分度盘中央刻度线左侧，此时应将平衡螺母向 ____（左/右）调节；②天平调好后，在质量为20g的空烧杯内倒入适量油，测得烧杯和油的总质量为39g；③将烧杯内的油倒入量筒，读出量筒内油的体积为20mL．则测得油密度为 ____g/cm³．按此方法测得油密度 ____（小于/等于/大于）油真实密度

能源危机、环境污染给社会的可持续发展带来越来越多的困难，人们节能环保的意识越来越强.下列做法不符合这一观点的是(    )

请认真阅读短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。

Can the time go slower?

— by Joanna Pitt

Can the time go slower?

I'm still thinking of

the answers.

Can the time go slower?

My head is not

yet clear.

Can the time go slower?

For me the rules of math are

too hard to remember.

Can the time go slower?

My grade is what my father

really cares about.

So can the time go slower?

My dear teacher,

I don't want to run behind others.

Oh no!

There are still lots of questions

to be answered!