A.440 B.532.4 C.644.2 D.708.6
A.累計(jì)增長(zhǎng)量等于相應(yīng)的逐期增長(zhǎng)量之和 B.累計(jì)增長(zhǎng)量等于相應(yīng)的逐期增長(zhǎng)量之差 C.累計(jì)增長(zhǎng)量等于相應(yīng)的逐期增長(zhǎng)量之乘積 D.累計(jì)增長(zhǎng)量等于相應(yīng)的逐期增長(zhǎng)量之商
A.12.5 B.17.5 C.18 D.22.5