【简答题】This crop does not do well in soils ?This crop does not do well in soils ___________ the one for which it has been specially developed. A) outside B) other than C) beyond ...
【单选题】-How about his design? -Well, to tell the truth, it is______but satisfactory.
【单选题】1828年德国化学家维勒合成了物质[CO(NH 2 ) 2 ],这一合成在当时产生的意义是
C.
首先发现[CO(NH 2 ) 2 ]这种物质
【单选题】水轮发电机-变压器组继电保护配置不包括()。
【单选题】How to Design Kitchen Well Over the years economic, social and technological factors have influenced the design of kitchens. Since it is often used simultaneously by both family members as well as gue...
【多选题】关于DGT-801型发变组保护装置中发电机基波零序电压式定子接地保护说法正确的有()。
A.
保护范围由机端至机内90%左右的定子绕组单相接地保护;
B.
与三次谐波定子接地配合使用组成大、中型发电机100%定子接地保护;
C.
保护接入3Uo电压取自发电机机端TV开口三角或发电机中性点单相TV的二次;
D.
动作延时应考虑与主变高压侧接地短路时的后备保护的最长动作时间来整定。