抗生素能够杀死或抑制某些病菌，但如果长期使用或滥用抗生素，就会使病菌的抗药性增强而失去治疗效果．　　　　　　．（判断对错）

    Today is Saturday. The weather is warm and sunny. Bob and Jack go to the park. There are many people there. The girl under a big tree is reading a book. Two boys are playing football on the grass. The girl in a red dress is riding a bike. Two women are talking. The man beside these women is playing with a baby. Bob and Jack are beside the river. They are sitting on the chair and drawing pictures.

作为系统的边界，细胞膜在细胞的生命活动中有多种功能．下列哪项不属于细胞膜的功能（　　）

因年度税收任务吃紧,某省多个县出现了征收“过头税”的现象,有的时间上“过头”,提前收税;有的幅度上“过头”,收一些不该收的税,或者提高税率等。下列对于上述做法的认识正确的是（  ）

①税收具有强制性,是否提前征缴无所谓

②纳税是公民的义务,纳税人应该积极配合

③这些做法违反了税收的固定性,纳税人有权对此进行批评和检举

④这些做法会加重企业负担,不利于经济的持续健康发展