What about ____?
A:play football
B:playing football
C:play the football
There must have been some ____ (understand). I didn't order all these books.
试管
①
②
③
纤维素悬液(mL)
2
纤维素酶液(mL)
1
反应温度(℃)
30
40
50
斐林试剂(mL)
砖红色深浅
++
+++
+
注:“+”的多少,代表颜色深浅.
根据以上实验设计及结果,以下说法不正确的是( )
如果你是一位光荣的科考队员,准备去南极考察,去之前必须明确考察内容,下列不符合南极考察的是( )