在烟草大田生长后期,()是影响赤星病流行的最重要因素。
参考答案:湿度
The classroom is very dirty because they always ___ something.[ ]
A. throw about
B. talk about
C. throw with
D. talk with
肿瘤血道转移最常见的部位是()
A.肺、脑
B.肺、脾
C.肺、肝
D.肝、脑
E.肝、骨