【单选题】The window needs______.
【单选题】I see that the window on the first floor needs fixed.
【单选题】腹部受钝性暴力闭合性损伤,X线检查膈下有游离气体提示
【判断题】被子植物的花有雄蕊和雌蕊,分别产生精子和卵,精卵结合发育成胚,所以花只是被子植物有性生殖的器官。
【单选题】下列有关被子植物生殖的说法,错误的是( )
【判断题】when use an envelope with a double window, your letter needs to be using block layout which allows the receiver's address to appear in the upper window of the envelope.
【单选题】The window needs __.
【单选题】The window needs _______.