【判断题】I watch her back her new truck out of the driveway. back is a a preposition.(判断:上述句子中的back是介词。)
【简答题】A.She is going to drop the class too. B.She doesnt know how to swim. C.It took her a long time to learn to swim. D.She teaches swimming,
【多选题】下列对作物营养生长与生殖生长关系描述正确的是
B.
营养器官是源 ,生殖器官是库且对前者有反馈作用;
C.
营养生长与生殖生长过程交织在一起,相互联系相互制约
D.
高产条件下,以加强营养器官的生长为主,从而促进生殖器官数量的增加
【简答题】简述肺泡通气障碍的类型及主要原因。(易)