A：胆固醇
B：抗体
C：维生素D
D：核酸
—I didn't hear you come in just now.
—That's good. We tried __________ any noise, for you were sleeping.
古代中国的官衙机构，官职名号各有渊源。“刺史”有“省察治状，黜陟能否，断治冤狱”之意，“行省”以“行中书省”得名，巡抚则以“巡行天下，抚军按民”而名。从名称来源看，“行省”是（ ）
李庄去年种小麦50公顷，今年种小麦60公顷．今年比去年多种百分之几？
