防止运动模糊最有效的方法是（）
A.应用滤线栅
B.应用过滤板
C.消除散射线
D.短时间曝光
E.应用增感屏
参考答案：D
Monsoons are characterized by（）.
A.light，variable winds with little or no humidity
B.p，gusty winds that blow from the same general direction all year
C.steady winds that reverse direction semiannually
D.p，cyclonic winds that change direction to conform to the passage of an extreme low pressure system
