台风引发的保险责任事故，车损险责任免赔率（）
A.0％
B.5％
C.10％
D.15％
参考答案：A
It was ______ the president's speech that the secretary spent the whole morning at home.
A．to prepare
B．preparing
C．prepared
D．be prepared
某正弦信号幅值为A，角频率为ω，初相位为ω0，则该信号的数字表达式为（）。
A．Asin(ωt)
B．Asin(ω0t+ω0)
C．Asin((ωt十ωt0)
D．Asin(ωt十ω)
