【单选题】沉深比h/D在何值时,螺旋桨沉深横向力明显减小?
【单选题】沉深比h/D的值在何范围时,螺旋桨沉深横向力明显减小?
【单选题】沉深比h/D在何值时,螺旋桨沉深横向力明显增大?
【单选题】沉深比h/D的值在何范围时,螺旋桨沉深横向力明显增大?
【判断题】磷脂具有亲水与疏水两种性质,其强的亲水性是由于含有一个磷酸基团
【单选题】What happened last night?
A.
The man ate during the show.
B.
Four contestants failed to win prizes.
C.
The woman missed the show.