A:①④
B:②④
C:②③
D:①②
自强是一种美好的道德品质。以下属于自强表现的是 ( )
蚯蚓的身体由许多彼此相似的体节构成,下列动物与它的特点最相近的是( )
如图,直线l与x轴、y轴分别相交于A、B两点,已知B(0,3),∠BAO=30°,圆心P的坐标为(1,0).⊙P与y轴相切于点O,若将⊙P沿x轴向左移动,当⊙P与该直线相交时,横坐标为整数的P′的个数是( )
有人说:中华民族迈向21世纪开始于1978年。这主要是因为1978年( )
A dog has a piece(片) of meat in his mouth. He sees himself(他自己) in the water. He thinks it is another dog. That dog has a piece of meat in his mouth,too. He wants to get(得到) his meat. Then he can have two pieces. He opens his mouth to bark(吠叫) and his meat goes down into(在……里面) the water.