【单选题】—Look, the paint is starting to come off ____ the wall is damp. —Well, we'd better have the wall repainted some day.
【单选题】The door______. We'd better have it repaired.
【单选题】已知某序列Z变换的收敛域为|z|<1,则该序列为( )
【单选题】我国是裸子植物种类最多,资源最丰富的国家,下列几种植物都是我国特有的裸子植物,其中是“孓遗”植物的是:
【单选题】We'd better have our meals______.
A.
at the same time each day
C.
when the meal is still hot
D.
when every one of the family is home
【判断题】我国是裸子植物种类最多、资源最丰富的国家。 [ ]