季节生长周期性
参考答案:
茶树生长随季节而变化的生长特性。我国大部分茶区,茶树新梢生长和休止,一年有三次(见轮性)
最可能的诊断是
A.腰部棘上韧带炎
B.腰椎结核
C.腰椎骨髓炎
D.单纯坐骨神经痛
E.腰椎间盘突出症
We can often see ice here in winter because the temperature usually stays__________ zero.
A.up
B.down
C.above
D.below