表示c和a成反比例关系的式子是[ ]
A.ca=15
B.c=5a
C.c+a=0
D.c-a=0
答案:A
肿势或软如绵、馒,或硬如结核,不红不热者,多
A.火B.寒C.风D.湿E.痰
27.Let' s move all the products into the hall and_____them in a proper order.
A.design
B.decorate
C.develop
D.Arrange