直接接触药品的包装材料和容器必须符合保障人体健康、安全及以下何项A．食品包装标准 B

读短文，判断正(√)误(×)。

      On Sunday Ben doesn't go to school. He gets up at eight o'clock. Then he goes to the library at nine fifteen.

He reads English stories there. Ben loves reading. He plays football in the morning with his friends, too. They

play at ten thirty. He visits his grandma with his parents at two o'clock. His grandma lives on a farm. They have

dinner together. Then Ben and his parents go home at eight o'clock.

( ) 1. Ben goes to school at eight on Sunday.

( ) 2. He goes to the library at nine fifteen.

( ) 3. Ben plays with his friends at ten thirty.

( ) 4. His parents visit his grandpa at two fifteen.

( ) 5. Ben eats dinner with his friends.

( ) 6. Ben goes to bed at eight o'clock.

不满14周岁的人实施违反治安管理的，由其监护人承担法律责任。( )

下列选项中，()是企业流动资产中的一个重要项目，是商业信用的直接产物。

A.预收账款

B.应付账款

C.应收账款

D.预付账款

金属腐蚀的本质是金属由能量高的（）向能量低的化合物状态转变的过程。