A:tears came to my eye
B:my heart was full of gratefulness
C:my eyes were filled with tear
D:I could hardly hold back my tear
下列结构或物质中不含有核糖的是( )
下列关于俄罗斯的叙述,正确的是( )
如图所示,三个相同的容器内水面高度相同,甲容器内只有水,乙容器内有木块漂浮在水面上,丙容器中悬浮着一个小球,则下列四种说法正确的是( )