﹣2的倒数是（ ）．
﹣．
一个三角形比与它等底等高的平行四边形的面积少7.8平方厘米，这个三角形面积是______平方厘米，平行四边形面积是______平方厘米．
If you ______ succeed, you will have to work hard.
A．are about to
B．are going to
C．will
D．are to
．
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