在图层调板中，按住哪个键单击图层前的眼睛图标可以将别的图层都隐藏而仅显示该图层（）。 ["Alt","Ctr","Shift","Ctrl+Shift"]
在PMS中，变电继电保护及自动装置记录填写完毕后，需要审核后方能归档。
为什么通常选用白鲢生产鱼糜和鱼丸产品？
负责产品质量争议调解的技术监督行政部门应当在接到申诉人提供的书面材料之日起三十日内终结调解。对于复杂的产品质量争议可以延长三十日。调解不成的，应当（） ["中止调解","终止调解","转交工商部门","立案查处"]
Two vessels are approaching each other near head on. What action should be taken to avoid collision?（）. ["The first vessel to sight the other should give way","The vessel making the slower speed should give way","Both vessels should alter course to starboard","Both vessels should alter course to port"]
何为LED在照明工程中的应用方向？
