Sun, moon, grizzly, black, spectacled, sloth: Bears all over the world can stand, shuffle, totter and walk on two legs, though they usually prefer four. They do not — strictly speaking — talk. But a zoo in Hangzhou, China, decided that the best way to clear up a conspiracy theory about one of its bears was to release a statement in the bear’s voice. The confusion appeared to begin in late July, when a video surfaced on the Chinese social media site Weibo of a sun bear named Angela standing…