向性运动
参考答案:
向性运动是指植物对外界环境中的单方向刺激而引起的定向生长运动。根据刺激的种类可以相应地分为向光性、向重力性、向水性和向化性等。向性运动是生长性运动、不可逆。
Here was a nice little present for everyone, with a suitable poem ________ to it.
A.attached
B.attacked
C.attracted
D.attributed
N2类载货车最大设计总质量为()。
A.小于3.5T
B.3.5~5T
C.3.5~12T
D.5~12T