（）是体验营销中的关键环节
参考答案：沟通
When you practice English speaking, you should not end up ____ in Chinese. [ ]
A. speak
B. spoken
C. speaking
D. to speak
SJ-210HZ检波器的灵敏度是（）V。
A.0.19
B.0.28
C.0.32
D.0.40
