A:
B:
C:
D:1
下列化肥属于复合肥料的是( )
——How many ________ are there on the table?
——Three. Are you thirsty? Let's cut one and eat it.
幽门螺杆菌是一种细菌,它是引起胃炎和胃溃疡等疾病的病原体.下列有关幽门螺杆菌的描述,错误的是( )
用下面两个词造句。
①表演:
②美妙: