信噪比越大则有用信号的成分越大，噪声影响也大。（）
参考答案：对
69. We had to _______hundreds of people because all of the seats were sold.
A．turn away
B．turn down
C．turn against
D．turn about
不属于计算措施项目综合单价的方法是( )。
A．参数法
B．实物量法
C．分包法
D．标价法
