For a purifier changing to a gravity disc with smaller hole diameter will move the interface towards the（）. ["bowl periphery","bowl center","upper surface","lower surface"]
長いことごぶさたしておりましたが、いかがお過ごしでしょうか。一度お目に（）たいと思っておりますが、なかなか時間がなく、失礼しております。 ["なり","入り","かかり","あずかり"]
The angle at which the anchor flukes penetrate the soil is the（）. ["burial angle","penetration angle","fluke angle","holding angle"]
削減读音正确的是（） ["さげん","さけん","さくげん","そしょく"]
简述圆形半眉虫。
简述动力线停电时的故障处理？
