题目

阅读下面短文，从每题所给的A、B、C、D四个选项中选出可以填入空白处的最佳选项。Waiting for the airplane to take off, I was happyto get a seat by myself. Just then, an air hostess came to me and asked, Wouldyou mind1your seat? A couple would like to sit together. The only 2 seatwas next to a girl with her arms in casts (石膏绷带), a black-and-blue face,and a sad expression. 3 am I going to sit there. I thought immediately.But a soft voice spoke, She needs help. Finally, I 4 to move to that seat. The girlwas named Kathy. She was injured in a car accident and 如图表示影响酶活性的曲线。下列相关叙述中，错误的（ ）A.从甲图可以看出，低温仅降低酶的活性B.从甲、乙两图可以看出，高温、强酸和强碱都会使酶失活C.从丙图可以看出，在一定范围内随着pH的升高，酶的活性可能逐渐降低D.从丙图可以看出，酶的最适pH为7