花卉植物生长的昼夜周期，是指花卉生长呈现（）的现象
A、白天快、夜间慢
B、白天慢，夜间快
C、白天生长，夜间不生长
D、夜间生长，白天不生长
参考答案：B
Which of the following is not a good habit to save water? [ ]
A. Reuse the water.
B. Water the flowers with waste water.
C. Often take a shower for long.
D. Sweep the floor with the dirty water.
下列不属于非语言传播技巧的是（）。
A.双目注视对方
B.点头
C.微笑
D.插入“是的”、“很好”等肯定性语言予以反馈
E.抚摸
