粘性土的塑性指数Ip为（）。
A、ωL-ωP
B、ωP-ωL
C、ωL×ωP
D、ωP／ωL
参考答案：A
.
______ miracle of the box office, “Avatar” brings back the peace and innocence to the heart of audience.
A．Calling
B．To be called
C．Having called
D．Called
种子纯度是净种子重占种子总重的百分率
