4个5平方厘米的小正方形拼成的图形,面积是20平方厘米.______.
根据分析可知拼后图形的面积不变,是4个小正方形面积的和.既4×5=20(平方厘米).
故答案为:√.
She had just ______ the shell of the hard-boiled egg and was starting to peel it off.
A.snapped
B.cracked
C.fractured
D.burst
反映一个国家在一定时期内生产的最终产品和劳务总和的经济指标是( )。
A.GNP
B.NI
C.NNP
D.GDP