BEIJING (AP) — Fears that China is threatening U.S. technology leadership in robots, electric cars and other advanced technologies are pushing the world's two biggest economies toward a full-blown trade war as the two sides prepare to impose tariffs Friday on billions of dollars' worth of each other's products. In fact, China remains heavily reliant on technologies from the West. Tech giant ZTE Corp.'s near-death experience after Washington barred it from buying U.S.