【简答题】在 Photoshop 中, JPEG图片中不包含 { }。
【多选题】下列关于不同种类的煤的性质排序中,哪些是正确的?
【单选题】What is hydrostatic head?
A.
The height difference between the high-water reservoir and low-water sink
B.
The mass of water in the reservoir
C.
The potential energy of the water in the reservoir
D.
The maximum power that can be extracted from the reservoir
【多选题】在Photoshop中,JPEG图片中不包含()
【判断题】水样加热完毕,必须迅速冷却至室温再加入硫酸和碘化钾,否则会因游离碘挥发而造成误差。
【单选题】下列排序不正确的是( )
A.
钢铁工业区位指向变化 : 煤炭→ 铁矿石→港口