BEIJING (AP) - A Chinese general said Beijing might respond with nuclear weapons if the United States attacked China in a conflict over Taiwan, news reports said Friday. While the general has no policy-making role in China, his comments could add to tensions with Washington at a time of U.S. worries about China's military buildup and the proposed takeover of the oil company Unocal Corp. by a Chinese state-run company. "If the Americans draw their missiles and position-guided ammunition into the target zone on China's territory, I think we will have to respond with nuclear weapons," Maj.-Gen. Zhu Chenghu, a...