生活水箱水池每年清洗()
A.1次
B.2次
C.3次
D.4次
参考答案:B
He made another wonderful discovery, _______________ of great importance to science.
A.which I think is
B.which I think it is
C.which I think it
D.I think which is
歌曲《ISeeYou》是下列哪部电影的主题曲()?
A.《泰坦尼克号》
B.《发凡达》
C.《十面埋伏》
D.《侠客行》