教育的个性化指什么？
Most troubles likely to occur with marine diesel engine can, if located in time, be remedied with no difficulty and many can be （）if the engine is maintained with a high sense of responsibility to the people on the part of the motormen and engineers. ["found out","eliminated","avoided","lowered"]
变电危急、严重缺陷发生后24个小时内必须录入系统。
蒙版的特点在于：白色表示隐藏本层图像，黑色表示显示本层图像，创建蒙版的同时，将同时创建一个可编辑的临时Alpha通道。
什么是大功率LED灯具的光利用率？
根据烧结设备供风方式不同烧结方法有哪些分类？
