题目

It was in the school _____ he had studied ______he began the important experiment. A  that ,where    B in which, which     C where, that    D where , in which 答案：C“无边落木萧萧下”，诗人因落叶而伤感。落叶体现了生物的哪一特征？A. 能够生长 B. 需要营养 C. 能够繁殖 D. 对环境的变化作出的反应