You are creating a Windows Forms application using the .NET Framework 3.5.You implement the PrintPage page event for a form.The users must be able to print the pages by using the Landscape orientation.You need to ensure that the users can set the page settings before printing. Which code segment should you use？（） ["A","B","C","D"]
致死量
硝苯地平用于高血压的治疗时常见踝部水肿，其原因主要是（） ["血浆晶体渗透压降低","血浆胶体渗透压降低","水钠潴留","尿量减少","毛细血管扩张"]
For which two tasks would it be best NOT to use the utility SQL*Loader？（） ["When loading selected rows into each table.","When loading data from an export dump file.","When loading data from disk， tape， or named pipes.","When your data is NOT being inserted from a flat file.","When using a record management system to access data files."]
（）：在开挖限界处按适当间隔排列炮孔，预先炸出一条裂缝，使拟爆体与山体分开，作为隔震减震带，起保护和减弱开挖限界以外山体或建筑物的地震破坏作用。 ["光面爆破","预裂爆破","定向爆破","微差爆破"]
挫折承受力
