公安机关职责的政治性，即公安机关的职责体现国家 * * 的根本属性。( )
参考答案：对
With the successful launch of Tiangong-I, which was ______ breakthrough in space field, China's space dream took a step closer to ______ reality.
A. a; / B. the; a C. a; the D the; /
两个整数的商是15，如果在被除数的末尾加一个“0”，则商是______．
