塑料土工格室的格室片的（）。
A.断裂伸长率应≤10%
B.断裂延伸率应≤10%
C.最大力伸长率应≥10%
D.断裂伸长率应≥10%
参考答案：A
You had 8 people In your project，one more person will be joining next week．You know that once the new person joins，the number of communication channels will increase by______．
A．No change in number of communication channels
B．8
C．12
D．20
