【单选题】After supper,my mother often washes in the kitchen.
【单选题】Her mother ______ her clothes every Sunday. [ ]
【单选题】What does Linda do before dinner?
A.
She washes the dishes.
B.
She helps her mother with the cooking.
C.
She helps her mother with the cooking and washes the dishes.
【单选题】风力角α随风舷角θ增大而增大,θ=40°~140°之间,α大约在多少度之间?
【单选题】风舷角θ=40°~140°之间时,风力角α大约在( )之间。
【单选题】风舷角在80°~100°之间的风称为()。
【单选题】风舷角在80°~100°之间的风称为:()
【单选题】变压器的铁损与电源的电压和频率有关,包括( )。