重度贫血的血红蛋白范围是()。
A.90~60g/L
B.60~31g/L
C.100~70g/L
D.70~40g/L
E.<30g/L
参考答案:B
________ her leg the last time, Brenda decided not to go on the school skiing trip this year.
A.Breaking
B.Broken
C.To break
D.Having broken
一旦出现了拥塞,马上会想到两种解决方案