【单选题】Mr. Brown likes to play_____ volleyball. But Mr. Black likes to play _____chess. [ ]
【单选题】---- Does your wife like tea? ---- Well, she doesn’t really ____ tea; she likes coffee better.
【简答题】A.She doesn't like tea although it's good for her health. B.She likes to drink tea for its good taste. C.She likes beef for its rich nutrition. D.She doesn't like beef at all for its taste.
【简答题】一平面简谐波,沿x轴负方向传播,角频率为ω,波速为u.设时刻的波形如图(A)所示,则该波的表达式为( ). A.一平面简谐波,沿x轴负方向传播,角频率为ω,波速为u。设t=T/4时刻的波形如图(A)所示,则该波的表达式为( )。
【简答题】一平面简谐波,沿x轴负方向传播,角频率为ω,波速为μ。设时刻的波形如图所示,则该波的表示式为( )。 (A) (
【单选题】下列四组动物中,不属于软体动物的是( )