【单选题】用一块平板挡水,平板形心的淹深为 h C ,压力中心的淹深为 h D ,当 h C 增大时, h D - h C ( )。
【简答题】( )里最大能填几? ( )× 7 8 ×( )
【单选题】He wasn't asked to take on the chairmanship of the society, ______ insufficiently popular with all members.
【单选题】—Mr.Fan is a excellent teacher,isn't he?—_________.He is very popular with students.
【简答题】连线。 ①72-41-24 ②55-23-11 ③43-9-7 21 7 27
【单选题】Another popular misconception is the that great talent is usually highly specific.