【单选题】在Photoshop中,如果一张照片的扫描结果不够清晰,可用下列哪种滤镜弥补?( )
【判断题】1900年普朗克提出了能量子假说,开启了量子论的大门。
【单选题】In the face of _____ failure, it is most important to keep up _____ good state of mind. [ ]
【单选题】In the face of all these difficulties, we're not discouraged and ________ good spirits. [ ]