下列各项对混凝土收缩没有影响的因素是（）
A.水灰比
B.混凝土强度
C.骨料弹性模量
D.养护条件
参考答案：B
可以把输出参数分配为哪一种SQL，Server数据类型？
The car Tom was ________ was once ________ his uncle.[ ]
A．in possession of；in the possession of
B．in the possession of；in possession of
C．in possession of；in possession of
D．in the possession of；in the possession of
