胆红素是从何种物质分解产生的A．清蛋白B．球蛋白C．氨基酸D．血

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问题单项选择题

胆红素是从何种物质分解产生的

A．清蛋白
B．球蛋白
C．氨基酸
D．血红蛋白
E．脂肪酸

答案

参考答案：D

解析：衰老红细胞所释放的血红蛋白为胆红素的主要来源，占80%～85%。

阅读理解

阅读短文，判断正(T)误(F)。

Today is Children's Day. I go to the park with my mother and father. There are many people in the park.

There are many children, too. Five boys are playing football. Two girls are drawing pictures. A little boy is

flying a kite. I am reading a book under the tree. My father and mother are looking at the flowers. Everyone in

the park is happy today. I love Children's Day.

( ) 1. Today is Teachers' Day.

( ) 2. I go to the park with my mother and father.

( ) 3. Five boys are playing cards.

( ) 4. Two girls are skipping.

( ) 5. My father and mother are looking at the trees.

单项选择题

负载上交流电为i＝10sin314t，，则负载是（）。

A、纯电阻性的；

B、纯电感性的；

C、感性的；

D、容性的。