题目

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。How to Prepare for Guests Guests are people whom we welcome sincerely and we should make sure they feel comfortable like they are in their home. Sometimes we get enough time to make preparations for guests, but sometimes we don't. This article will be beneficial for both these kinds of people. Get a bedroom for your guests. It doesn't have to be complicated. Change bed covers, clean the bathroom and you can even add a nice scented(芬芳的) candle to spice things up. The1、实验材料的选择关系到实验的成败，下列相关实验材料选择正确的是 A．苹果汁用于脂肪的鉴定实验 B．菠菜叶稍带些叶肉的下表皮用于观察线粒体 C．鸡的红细胞悬液用于观察动物细胞的有丝分裂 D．过氧化氯酶用于探究pH对酶活性的影响