如图为直径是10cm圆柱形油槽,装入油后,油深CD为2cm,那么油面宽度AB= cm.
We all need a （health） environment．
English （ speak） all over the world．
The red umbrella doesn't belong to me﹣﹣﹣﹣it's （she）．
He was driving as （ fast） as possible．
I promise I （ send） you an email to explain all of these tomorrow．
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