题目内容：
关于果树根系在年周期中生长特点的叙述正确的是( )A.在年周期中有自然休眠现象
B.在年周期中根系的生长动态与水分、通气状况无关
C.在不同深度土层中，根系生长速度一致
D.在年周期中根系与地上部器官生长呈同步生长
参考答案：
选择题：关于果树根系在年周期中生长特点的叙述正确的是( )A.在年周期中有自然休眠现象B.在年周期中根
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