9个号码复式三中三多少组公式

简介：In order to prevent the Ming army from landing, a large number of boulders were piled on the shore, connected with iron chains, and huge and sharp antlers were planted on the shore. If a small boat rushed up, it would not be stopped by the iron chains, but would also be capsized by the antlers. But now that the tide is high, the effectiveness of these defensive fortifications may be greatly reduced.