马的正常体温范围为（）℃。
A、36.5～38.5
B、37.5～39.5
C、37.5～38.5
D、38.0～39.0
参考答案：C
属于中央预算的政府采购项目。其集中采购目录由( )确定并公布。
A．国务院B．国务院财政部门C．国家审计部门D．供应商
If two fair coins are flipped and two fair six - sided dice are rolled, all at the same time, what is the probability of ending up with two heads (on the coins) and two sixes (on the dice)（）
A. 0.4167.
B. 0.0039.
C. 0.0069.
