【简答题】把 内通过某一导体横截面的电荷量定义为电流强度(简称电流),用 I 来表示。
【单选题】After abandoning a vessel,water that is consumed within the first 24 hours will ______.
A.
pass through the body with little absorbed by the system
B.
help to prevent fatigue
C.
quench thirst for only 2 hours
D.
help to prevent seasickness
【判断题】根据同坡屋面交线的投影规律,判断该同坡屋面交线的水平投影是否对。