根据句意和汉语提示,在空白处填入适当的单词.

1. May I ___________(借) your dictionary? I left mine at home.

2. Everyone should take an active part in _______________(保护)the environment.

3.The confident young man will have his ______________(二十) birthday.

4. Everyone should try to be _____________(有礼貌的) and helpful to others.

5. China has got a _______________( 人口) of 1.3 billion.

下运动神经元性瘫痪肢体可出现的表现之一是（）

A.神经传导速度异常，失神经电位

B.腱反射亢进

C.Babinski征阳性

D.无肌肉萎缩

E.肌张力增高