把250克盐溶于1千克水中,盐占盐水重量的[ ]
A.25%
B.125%
C.20%
答案:C
I want to watch the basketball match. Would you please _______ the TV?[ ]
A. turn on
B. turn off
C. turn down
D. turn up
血站各业务岗位工作记录,应当满足及时等要求,但不包括以下哪项()。
A.内容真实
B.项目完整
C.格式规范
D.字迹清楚
E.有单位盖章