【单选题】如图所示,在匀强电场中有 Δ ABC ,其平面与电场线平行, O 为三条中线 AE 、 BF 、 CD 的交点。将一电荷量为 如图所示,在匀强电场中有 Δ ABC ,其平面与电场线平行, O 为三条中线 AE 、 BF 、 CD 的交点。将一电荷量为 1.0×10 -8 C 的正点电荷从 A 点移到 C 点,电场力做的功为 3.0×10 -7 J ;将该点电荷从 C 点移动到 B 点,克服电场力做...
【简答题】词汇 (每小题1分,计15分) 小题1:It’s i______ for you to fly to the sun 小题2:It is so dry here that you cannot find a d_____ of water. 小题3:The local g_____ has taken actions to protect wild animals. ...
【简答题】mp3 Maintenance check is one of the most important 1 activities. Aircraft maintenance engineer 2 by aviation 3 are trained to check and overhaul airframes, 4 ...