下列哪项是恶性肿瘤的主要特征（）。
A.核分裂象多见
B.细胞丰富
C.瘤巨细胞形成
D.浸润性生长和转移
E.血管丰富
参考答案：D
大气中由水汽所产生的（）称为水汽压，在国际单位制中采用（）为单位。
Woman: I don’t know how Shawn feels after I turned down his business proposal. Man: He’s cool with it. Question: What does the man mean
A. Shawn feels hurt.B. Shawn doesn’t mind it.C. Shawn is a calm person.D. Shawn knows nothing about it.
