艾滋病的病死率极高,目前尚无彻底治愈的方法,但是完全可以预防。
参考答案:对
Fei Junlong and Nie Haisheng said,"______We didn't see the Great Wall,we felt excited when we passed
over China." [ ]
A. Because
B. If
C. Although
D. As
常用的型号为EZNi—1的纯镍铸铁焊条,牌号是()。
a.Z208
b.Z308
c.Z408
d.Z508