空分精馏塔下塔底部到顶部温度变化规律是（）。A.逐渐升高 B.逐渐降低 C.先升高后 发布时间：2019-11-16 16:02 │ 来源：www.tikuol.com 题型：单项选择题 问题： 空分精馏塔下塔底部到顶部温度变化规律是（）。A.逐渐升高B.逐渐降低C.先升高后降低D.先降低后升高
题型：单项选择题 阅读下列短文，从各题A、B、C、D中选出能回答所提问题或完成所给句子的最佳答案。 Welcome to the zooOpening time: Price:From Monday to Friday Adults: ￥208:30 a.m.—5:30 p. m. Children: ￥10On Saturday＆Sunday8:30a.m.—6:00 p.m.Location: Chongqing Street, Laoshan District (区), Qingdao City1. The zoo opens _____ a week. A. two days B. five days C. six days D. seven days2. On Tuesday, the zoo closes at _____. A. 5:30 p.m. B. 6:00 p.m. C. 6:30 a.m. D. 8:30 a.m.3. On Wednesday, the zoo is open for_____. A. 8 hours B. 8.5 hours C. 9 hours D. 9.5 hours4. The zoo is in the city of _____. A. Qingdao B. Shandong C. Laoshan D. Chongqing 5. Beibei is 11 years old, and this Sunday she wants to visit the zoo with her parents. How much should they pay for the tickets? A.￥20. B.￥30. C.￥40. D.￥50. 查看答案
题型：单项选择题 受体激动剂的特点是（）A.与受体有亲和力，无内在活性B.与受体有亲和力，有较强内在活性C.与受体无亲和力，有内在活性D.与受体无亲和力，有较强内在活性E.与受体有亲和力，有弱的内在活性 查看答案