A:three times as bigger a
B:bigger than three times
C:three times as the size of
D:three times the size of
诗《祖国啊,我亲爱的祖国》中第三节“雪被下古莲的胚芽”“挂着眼泪的笑涡”“新刷出的雪白的起跑线”,这些意象各自又代表了什么?
(提示:NaHCO3+HCl→NaCl+H2O+CO2↑)
如图,△ABC中,AB=7,BC=6,AC=8,延长∠ABC、∠ACB的角平分线BD、CE分别交过点A且平行于BC的直线于N、M,BD与CE相交于点G,则△BCG与△MNG的面积之比是____.