唐菖蒲切花的采收适期是（）。
A、孕穗期
B、花全部开放
C、1-3朵小花露色
D、一半花开放
参考答案：C
The wealth of a country should be measured________the health and happiness of its people as well as the material goods it can produce.[ ]
A. by all means
B. in line with
C. in terms of
D. in case of
电缆必须绑扎，绑扎后的电缆应互相紧密靠拢，外观平直整齐.电缆表面形成的平面高度差不超过（）毫米，电缆表面形成的垂面垂度差不超过（）毫米。
A、1/1
B、3/3
C、5/5
D、8/8
