新生儿诊断为重度贫血,Hb应是()
A.30~60g/L
B.30g/L
C.60~90g/L
D.90~120g/L
E.120~145g/L
参考答案:C
His brother met him at the Great Theatre yesterday afternoon, so he ____ have attended your lecture.
A.couldn’t
B.needn’t
C.mustn’t
D.shouldn’t
重交通等级混凝土路面的基层材料宜选用()。
A.贫混凝土
B.石灰粉煤灰稳定粒料
C.碾压混凝土
D.沥青稳定碎石