对愈伤组织诱导，被子植物比裸子植物敏感，单子叶植物比双子叶植物敏感。
参考答案：错
The road was so narrow that there would be traffic jams____, especially during the rush hour.
A．every now and then
B．more or less
C．from then on
D．up and down
六味地黄丸中，体现"三泻"的是（）
A．川芎
B．当归
C．黄芪
D．附子
E．白芍
