My sister saw a lovely cup when we are shopping the other day. She liked it at once. Then she bent down and picked up to look at a  price on it. As she did this, lots of tea splashed(洒)on his T-shirt! I had to try hardlynot to laugh at her shocked face! My sister wantedget out of the shop as fast as she could when a shop assistant came over to us. It was turned out to be her own cup, that she had left on the shelf by mistake. The assistant was clearly so embarrassed as my sister, and I just thought it was funny!

由全国人大常委会制定颁布的规范性文件称作（）

A.卫生法律

B.卫生法规

C.卫生法

D.法律的渊源

E.法律的规范