题目

阅读理解，根据短文内容判断正（T）误（F）。One day, Lucky Dog played with Brave Dog in a park. They rowed boats. They rode bikes. They flew kites.Later, they were tired. They had a rest near the lake. There, they met a cat. They said hello to each other. Then, the cat found a fish behind the dogs. The cat asked the dogs,” Lucky Dog, is this your fish? “Lucy Dog said no. The cat asked Brave dog, “Brave Dog,is this your fish? Brave Dog said no. The cat said ,”Oh, it’s not your fish. No dogs like fish, Oh, it’s my fish, Now! Hmmm, yummy! “The dogs laughed,” All 8．若“?x∈[$\frac{π}{3}$，$\frac{2π}{3}$]，cosx≤m”是真命题，则实数m的最小值为（　　）A．-$\frac{1}{2}$B．-$\frac{\sqrt{3}}{2}$C．$\frac{1}{2}$D．$\frac{\sqrt{3}}{2}$