一定量某理想气体按户V2=恒量的规律膨胀,则膨胀后理想气体的温度()。
A.将升高
B.将降低
C.不变
D.升高还是降低,不能确定
参考答案:B
Tom looked at Jenny, tears ______ his eyes, and shouted out the words ______ in his heart for years.
A.filling; having hidden
B.filled; hidden
C.filling; hidden
D.filled; hiding
严重缺乏时主要表现为巨幼红细胞性贫血的是()
A.维生素B1
B.维生素B2
C.维生素B12
D.维生素C
E.维生素D