七边形的内角和是[ ]
A.360°
B.720°
C.900°
D.1260°
答案:C
(2014·平顶山模拟)—Have you moved into your new house?
—Not yet.I’ve no time to get it________.
A.furnishing
B.furnished
C.furnish
D.to furnish
影响小肠内钙被动转运的是()。
A.体内维生素D的水平
B.机体钙水平
C.肠腔中钙浓度
D.肾上腺素的水平
E.激素水平