我国国民经济核算新体系由()组成。
A.资产负债表和资金流量表
B.国际收支平衡表和投入产出表
C.社会再生产核算表和经济循环帐户
D.资产负债表和投入产出表
参考答案:C
I ______ that there ______an evening party on Saturday evening. [ ]
A. thank; was
B. guess; will be
C. thought; is
D. guessed; is going to be
X、Y、Z三种元素的原子,其最外层电子排布分别是ns1、3s23p1和2s22p4,由这三种元素组成的化合物的化学式可能是
A.XYZ2
B.X2YZ3
C.X2YZ2
D.XYZ3