题目

It’s not easy being a teenager（13至19岁青少年）-nor is it easy being the parent of a teenager．You can make your child feel angry, hurt or misunderstood by what you say without realizing it yourself．It is important to give your child the space he needs to grow while gently letting him know that you’11 still be there for him when he needs you．    Expect a lot from your child，just not everything．Except for health and safety problems， such as drug use or careless driving，consider everything else open to discussion．If your child is unwilling to discuss something，don抗生素的研制和使用使亿万人受益．下列生物中，可产生抗生素的是（ ）A．青霉 B．酵母菌C．大肠杆菌 D．肺炎双球菌