题目

生物体生命活动需要的最终能源、主要能源、直接能源依次是（  ） ①脂肪 ②核酸 ③糖类 ④蛋白质 ⑤ATP ⑥太阳光 A . ①③⑤ B . ②④③ C . ⑥③⑤ D . ⑥①⑤ 答案：CThe date for the conference we had been looking forward ______ at last.A. to come B. to coming C. to came D. to will come