ISO9001：2000质量管理体系要求是对技术规范的（）
A.替代
B.加强
C.补充
参考答案：C
一个直角三角形，有一个锐角是28°，另一个锐角是______．
is more important is as the earth cooled down, water began to appear on its surface.
A．What /that
B．That/what
C．What / what
D．That / that
