A：管壁厚，弹性大
B：将心脏的血液输送到身体各部分去
C：大多分布在身体较浅的部位
D：管内血流速度快
阅读短文，回答问题。
I'm David. I'm an English boy. Now I'm in Wuhan. It's very hot and sunny here. I wear my new cap and T-shirt. But my shoes are old and small. I think I'll get a new pair of shoes on my birthday.
