画一个周长是12.56厘米的圆，圆规两脚间的距离是____厘米
⑴You need a swimming cap. ____
⑵First,you should wash yourself. ____
⑶Next,you should do warm-up exercises. ____
⑷Then, you can enjoy your swimming lessons. ____
⑸You need a swimsuit.____
A. B. C. D. E.
长江是我国的第一大河．读“长江干流纵剖面示意图”回答下列问题
B. 
C. 
E.
