什么叫风力发电机组的浆距角？
参考答案：
在指定的叶片径向位置（通常为100%叶片半径处）叶片玄线与风轮旋转面间的夹角。
— I wonder if she _____ to the ball.
—She is sure to come if she _____ time tonight.[ ]
A. comes, has
B. will come, will have
C. comes, will have
D. will come, has
安全线向车档方向不应采用下坡道，其有效长度一般不小于（）米。
