—It was in 2000 ________ we both studied in Nanjing University.
A:when it was that; when
B:when was it that; when
C:when it was that; that
D:when was it that; that
非洲是世界上经济发展水平最低的大洲,其主要原因是( )
对下列句子所使用的修辞手法理解不够准确的一项是( )
下图表示人在呼吸时,胸腔内膈肌存在的两种状态。当交警怀疑某司机是酒后驾车时,都会要求该司机对着酒精测试仪吹气。司机在吹气时,膈肌状态的变化为( )