题目

蛋白质分子能被肽酶降解，至于哪一个肽键被断裂则决定于肽酶的类型。肽酶P能断裂带有侧链R4的氨基酸和相邻氨基酸的氨基基团之间的肽键。下列说法正确的是 A．上图所示肽链由四种氨基酸脱水缩合而成    B．该肽链中含有游离的氨基和羧基数各1个C．在肽酶P的作用下，经过脱水缩合可以形成两条肽链 D．肽酶P可以催化3处的化学键断裂Moving to a new city and state was difficult for me, especially in winter. Little did I know that a Colorado snowstorm would greet me after I had been in my new home for only a week.I just missed home. But more than the old house and the beach, I missed Stacey, my best friend. And I missed our lovely tea. Going to a sweet little tearoom, we had discovered was a special treat for us. The place was a Victorian dream, with delicate teacups and tablecloths with flower prints. The hat shelf near the front door swept us back to childhood. Stacey and I became little girls, trying on different hats until we found the perfect one for our dress-up tea party. We would then choose a lovely table and order our tea. That was a precious time, filled with laughter between scones（煎饼） and sharing our lives between tiny cucumber sandwiches.Springtime descended upon Denver, and the sun lightened my heart. But I still fought loneliness almost every day. I decided to explore the Denver area. While my husband went to the office, I took time to see what our new area had to offer.One day, I was walking along the street when suddenly the words "Tea Leaves" caught my eye. A tea room? Here, in the land of loneliness and pain?I walked through the doors, and tears came to my eyes. It was a beautiful room, not Victorian, but simple and lovely.I sat down and ordered a pot of tea, a cucumber sandwich, and some scones. It felt silly and wonderful --- and it felt like home. For the first time since moving, I felt as if this new city and state could be, would eventually be, my home. I would come back here and bring new friends. When Stacey visited, we would come here.I lifted my cup and made a silent toast. I toasted Stacey, whom I missedly, and I toasted the sweet little tearoom that lessened my pain1.The author's hometown ______________A.never snowsB.is still warm in winterC.has a long historyD.is in an area by the sea2.The underlined word "treat" in Paragraph 2 probable means ____________A.delicious foodB.something pleasantC.serviceD.a kind of tea party3.We can know from Paragraph 3 that the author ______________A.didn't adapt to the new lifeB.felt comfortable in the new environment in springC.didn't feel lonely any more in springD.wanted to actively adapt to the new environment4.Which of the following about "Tea Leaves" is true?A.It made the author recall her childhoodB.It looks silly and wonderfulC.Cucumber sandwiches and scones are its specialtiesD.It touched the author5.We can infer from the text that the author would probably ____________A.open her own teahouseB.ask the owner of the teahouse to decorate it like a homeC.make new friends in DenverD.go back to her hometown to visit Stacey