求证：AB=AC．

①认识运动总是从认识到实践再到认识的上升过程

②人们对事物的认识要受到具体的实践水平的限制

③求索真理追求真理是人类认识世界的最终目的

④客观事物本质的暴露和展现需要经历一个过程

判断下面的说法是否正确

划竹筏的好像是一个女人。这是比喻句。（    ）

下面表示骨、关节和肌肉的模式简图中，最准确的是（　　）

用方框所给出的选项完成对话。

A middle school student and her mother are visiting the security education show(安全教育展)

M: Come on, darling, so many pictures here!

S: ____  

M: Traffic safety.

S: Sounds boring.

M: ____ 

S: Maybe. Oh! Mum, look at this picture, a boy is hit a car when he is running across the road. ____ 

M: So it is!

S: ____  That helps us stay safe from danger.

M: Yes, better safe than sorry. Let's go to another hall to learn more about hot to protect ourselves.

S: ____  Let's go.