用“成本系数法”计算加工后的原料成本，只适用于相同的原料（）
A、毛重
B、损耗重
C、损耗率
D、净料率
参考答案：D
采用反压护道是解决软土地基上路堤的( )问题。
A．强度
B．沉降
C．稳定性
D．抗压
Soon, more of the information we receive via the Internet could come (71) in digital wrappers.
Wrappers are made up (72) software code that’s targeted to do specific things with the data (73) within them, such as helping to define queries for search engines. They also keep (74) from (75) access to that code.
（75）处填（）。
A．gain
B．gained
C．gains
D．gaining
