21.35+43.68=()
A.64.03
B.54.03
C.65.3
D.65.03
参考答案:D
--- Aren’t you the chief editor?
--- No, and I ______________.
A.don’t want to be
B.don’t want to
C.don’t want be
D.don’t want
采用石灰软化处理,可将水中的镁盐永硬变为钙盐永硬。