在单元格中输入以下________内容,可以计算A1和A2单元格的和。
A. ="A1"+"A2"
B. "A1"+"A2"
C. =A1+A2
D. A1+A2
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用所给单词的适当形式填空Until last summer he ______ to go to France for a trip.(decide)
用所给单词适当形式填空And when I ______ for marmalade, they brought strawberry jam.(ask)
Match the words and phrase with its proper meaning.
对一斜率为正且先与价格轴(纵轴)再与数量轴(横轴)相交的直线型供给曲线,其供给价格弹性( )。
A. 等于0
B. 等于l
C. 大于1
D. 小于1