中度贫血的血红蛋白含量是()
A.120~90g/L
B.110~90g/L
C.90~60g/L
D.60~30g/L
E.50~30g/L
参考答案:C
—According to my grandma,it is a good idea to eat chicken soup when you have a cold.
—________,scientists agree with her.
A.Sooner or later
B.Once in a while
C.To be exact
D.Believe it or not
造成货物列车脱轨55辆的事故属于()。
A、特别重大事故
B、重大事故
C、较大事故
D、险性事故