按塔里木油田规定,浅气井采用()MPa的压力附加值。
A、1.5~3.5
B、2.0~4.0
C、3.0~5.0
D、0.07~0.15
参考答案:C
What did he say? I don’t know what________.
A.did he say
B.he says
C.he said
D.he is saying
某同学将七种生物依据某一标准进行分类,结果如下面框内所示,你认为他分类的依据是( )
①体温是否恒定 ②脊柱的有无 ③卵生还是胎生 ④水生还是陆生.
A.①或②
B.②或③
C.③或④
D.①或④