根外施肥 exoroot fertilization
参考答案:
植物生长发育期间,将低浓度的肥料溶液喷洒在植物叶片或用器件将肥料溶液注入植物地上部的一种施肥方法。
What do you think of the set of popular science books?-- It couldn't be better! It ______ many problems we are interested in exploring.[ ]
A. covers
B. consults
C. measures
D. writes
简述圆筒的纵缝装配。