孕妇患乙型肝炎传给胎儿的主要方式为
A.经粪-口传播
B.注射血浆制品传染
C.母婴垂直传播
D.经输血传播
E.经哺乳传播
参考答案:C
—Thank you for the present you sent me. It's so nice.
—_______. [ ]
A. No, thanks
B. I'm glad you like it
C. Please don't say so
D. No, it isn't so good
什么是虚拟存储器?