如图所示，两球间的距离为r，两球的质量分布均匀，大小分别为m1、m2，则两球的万

比较地球的自转与公转

每克脂肪在体内氧化可产生热能

A．47.5kJ

B．37.7kJ

C．9.0kJ

D．4.0kJ

E．50.0kJ

I still remember the last time I went to the playground with two of my children. It had rained during the night and the playground was very muddy (泥泞的). They had just put on clean clothes, so I was a little worried about the mud on the playground. It was not long before Kathy got her beautiful skirt dirty on the playground. She dug through the rocks. I was about to blame (指责) her for getting her clothes dirty when she ran towards me with a smile on her face. When she got to me, she handed me a little heart-shaped rock and said, “Here, Mom! Here is a heart for you —just because I love you! Keep it!” With tears in my eyes, I thanked her.

Should I blame her for getting her clothes muddy? No way! I still have that little heart-shaped rock. It is one of the best gifts that I have ever received. I realized that many times it was not necessary for us adults to worry about the small things our children did. Let them do what they’d like to.

I will spend a lot more time on the playground with my children. I’m sure I will learn a lot from them. It makes me think of the days when my grandfather told me, “You would not enter the kingdom of happiness until you pretended (假装) to be a small child.”

小题1:At first, the author wanted to blame Kathy because she __________.

A．ran on the playground

B．dug through rocks

C．gave her a muddy rock

D．got her clothes dirty小题2:The author was deeply moved by her daughter’s _____.

A．digging task on the playground

B．special way to show her love

C．smile on her face when running

D．love of the muddy playground小题3:From Paragraph 2, we can learn that the author thought parents should _________.

A．not worry about the small things their children do

B．allow kids to do whatever they like

C．keep the presents given by children

D．not give too much care to their own children小题4:The author’s grandfather’s words imply that _______.

A．children care more about happiness than adults

B．adults can not share children’s happiness

C．children may find happiness more easily in life

D．adults find it hard to know children’s happiness

下列选项中，有关卫卫生间楼地面聚氨酯涂膜防水层施工，说法正确的（）

A.用小滚刷或油漆刷将已配好的防水混合材料均匀涂布在底胶已干固的基层表面上

B.涂布时要求厚薄均匀一致，平刷3～4度为宜

C.防水涂膜的总厚度不小于1mm为合格

D.涂完第一度涂膜后，一般需固化2h以上，在基本不粘手时，再按上述方法涂布第二、三、四度涂膜，并使后一度与前一度的涂布方向相垂直

E.对管子根部和地漏周围以及下水管转角墙部位，必须认真涂刷，涂刷厚度不小于2mm

某甲级工程造价咨询公司分立为乙公司和丙公司，根据我国相关规定，原甲级造价咨询资质（）承继。

A.只能由乙公司

B.只能由丙公司

C.可以由乙公司或丙公司

D.只能由乙公司和丙公司共同