下列哪些运动不适合老年人选择（）。 A.游泳 B.慢跑 C.散步 D.百米短跑 E.

The teacher found ____ difficult to decide ____ he would take with him to attend the conference.

A．it; whom

B．himself; who

C．this; whom

D．that; who

In my opinion, all Mr Li ______ good to his students in his class at present. He is very strict with them in their studies.

A．does does does

B．does does do

C．does do did

D．did do does

该图为我国局部地区某种气象灾害平均每年出现的次数等值线图。读图完成下列问题。（10分）

（1）判读图示气象灾害并分析甲地受其影响小的原因（6分）

（2）列举两种该气象灾害的防御方法（4分）

金属抵抗永久变形和短列的能力称为（）

A、强度

B、硬度

C、属性

D、韧性

各种可兴奋组织产生兴奋的共同标志是（）

A．肌肉收缩

B．腺体分泌

C．产生神经冲动

D．产生电位变化

E．产生感觉