题目

Many kids develop problems from finger sucking that can _________ life-long problems unless _________ properly. A . cause; treated B . lead; treating C . suffer; to treat D . make; being treated 答案：A外伤出血时，若血流猛急，呈喷射状。这说明伤及了：         （  ） A、动脉      B、真皮        C、静脉      D、毛细血管