按住Ctrl键在Photoshop中的空白区域双击可以实现:() ["新建一个空白文档","新建一幅图片","打开一幅图片","只能打开一幅扩展名为.psd的文件"]
泵所需要的进口净正压头,可以通过以下途径提高() ["增加液体静压头","增加储罐液体","增加储罐的压力","抬高储罐基础","增加进口管长度"]
直向(直系)同源物
地形图上的地貌包括() ["山坡","河流","树林"]
在Photoshop中的空白区域,双击可以实现:() ["新建一个空白文档","新建一幅图片","打开一幅图片","只能打开一幅扩展名为.psd的文件"]
预防及解除呼吸急促的方法