干化学法测定尿蛋白，主要测定的是（）。 A.清蛋白 B.球蛋白 C.本-周蛋白 D.

某点电荷和金属圆环间的电场线分布如图所示，下列说法正确的是（　　）

A．a点的电势高于b点的电势

B．若将一正试探电荷由a点移到b点，电场力做负功

C．c点的电场强度与d点的电场强度大小无法判断

D．若将一负试探电荷由c点移到d点，电势能增加

句型转换。

1. There are different ways of doing this.

There are ____________ ways of doing this.

2. He is more than my teacher; he is my friend.

He is ________ _________ my teacher; he is my friend.

3.They named their baby Tom, which is also the name of the baby's grandfather.

The baby was _________ ________ his grandfather.

4. A large park has been built in our city; we are able to amuse ourselves after work.

The large park built in our city _________ us _______ a place to enjoy ourselves.

5. I'll do all I can to finish the work on time.

I'll do ________ _______ _________ to finish the work on time.

“甲规则适用于乙案件，丙案件在实质上与乙案件类似，因此甲规则也适用于丙案件”是对下列哪种推理形式的表述( )

A．演绎推理

B．辩证推理

C．归纳推理

D．类比推理

凡是作用线不在同一个平面的力系统称为平面力系。