A：热带
B：寒温带
C：暖温带
D：亚热带
Henry was badly ill but he r____to take the medicine．
-----I ____（读）a book at home.
“试管婴儿”的培育诞生和嫁接繁殖无核蜜橘在生物学上依据的原理依次是（ ）
