– I hear Tom is leaving. –____________ why?
A:And
B:But
C:Or
D:So
与80°E经线相对的经线是( )
下面关于生态系统的说法正确的是( )
计算:tan245°-2sin30°+(2﹣1)0 -12-2
下图为我国某水库常年平均月均水位变化和月入水库水量图,读图回答问题。
— What;s the matter?
— I am having trouble ______ who has taken my book.