. In the market near our school, there a
题型：选择题
问题：
.
In the market near our school, there are ______ supplies of fruits, fish and meat. You can buy whatever you like.
A．abundant
B．expensive
C．cheap
D．colorful
题型：选择题
学校校园有后两道门，为了加强校内安全，学校给值班室安上了指示灯，只有当两道门都关上时（关上一道门相当于闭合一个开关），值班室内的指示灯才会发光，表明门都关上了。下列图中符合要求的电路是（ ）
A. B. C. D.