SDH使用（）复用方式，PDH使用（）复用方式。

钢丝绳与其端接装置的接合处（绳头组合）机械强度，至少应能承受钢丝绳最小破断负荷的（）%。

A、80

B、90

C、100

D、110

根据下面对话情景，在每个空白处填上一个适当的句子，使对话的意思连贯、完整。

A: Hello, Fangfang. We are looking for you everywhere.小题1:______________________?

B: I went to the school library. What’s up?

A: We’re going to help the children in hospital. Will you join us?

B: Of course. 小题2:_____________________?

A. This Saturday morning. We’ll stay there for the whole day.

B. That’s great. See you then.

(At the Children’s Hospital)

B: Hello, I’m Fangfang. Can I have your name, please?

C: I’m Li Huan.

B: Hello, Li Huan. 小题3:_____________________?

C: I’ve got a high fever. I have stayed here for five days.

B: How are you feeling now?

C: 小题4:______________________.I hope I can go back to school soon.

B: Don’t worry. I will help you with your lessons.

C: 小题5:_____________________.

B: It’s a pleasure. Now, let me read you a story.

下面哪种防护属于对沿河河堤河岸冲刷的间接防护( )。

A．砌石

B．植物

C．石笼

D．丁坝

危险化学品、易制爆危险化学品在道路运输途中丢失、被盗、被抢或者出现流散、泄漏等情况的，驾驶人员、押运人员应当立即采取相应的警示措施和（）措施，并抽当地公安机关报告。

A.预防

B.安全

C.保护

D.其他选项都错误

试述儿童少年神经系统的年龄特征，指出体育教学与运动训练中应注意的问题？