是肽链主链骨架原子相对空间位置（） A．一级结构 B．二级结构 C．超二级结构 D． 发布时间：2019-03-31 10:12 │ 来源：www.tikuol.com 题型：单项选择题 问题： 是肽链主链骨架原子相对空间位置（）A．一级结构B．二级结构C．超二级结构D．三级结构E．四级结构
题型：单项选择题 阅读理解。 Recently a really strange thing happened at Wuhan Liangdaojie Middle School in Hubei. Over 600Junior 1 and 2 students at the school took part in a "caring for an egg like a baby" activity. They were asked to keep an egg close at hand for a month without breaking it. "It's hard for parents to bring up their children but many students take their parents' love for granted.(把…当作理所当然)," said Liu Kang, the school's director. "We wanted them to learn that lesson bytaking care of an egg as a baby." Li Mingxuan is one of the students. His egg didn't break during the month, but he felt exhausted. "Youhad to put so much attention to it," said the 13-year-old boy, "I now understand how much my parentshave done for me. I'll prepare them a glass of milk to help them sleep better every night." Not everyone was as lucky as Li. More than 450 of the 600 students broke their eggs. Yan Yueming broke his egg in just five days, which made him very frustrated. He said, "I can't imagine how sad my parents would be if there was something wrong with me, their 'egg'!" I want to return theirlove and I'll help them with chores every day." promised the 13-year-old boy. 1. Li Mingxuan felt very ______ during this month. [ ]A. frustrated B. sad C. exhausted D. happy 2. ______ were broken in the month during this activity. [ ]A. No eggs B. All the eggs C. 600 eggsD. More than 450 eggs 3. According to this article, we know after this activity Yan Yueming will ______. [ ]A. help his parents with chores every day B. prepare his parents a glass of milk to help them sleep better C. not break the eggs any more D. be glad to help others 4. The aim of this activity is to ______. [ ]A. teach the students to be more careful B. teach the students the eggs are fragile (易碎的) C. teach the students to understand their parents D. teach the students to love their teachers 5. What can we infer (推断) from the article? [ ]A. The students always argue with parents at home. B. The students don't study hard at school. C. The students don't like this activity. D. The students learn to love their parents through this activity. g 查看答案
题型：单项选择题 在施工组织设计中未编制安全技术措施、施工现场临时用电方案或者专项施工方案的，责令限期改正，逾期未改正的，责令停业整顿，并处( )的罚款。A．3万元以上8万元以下B．5万元以上10万元以下C．10万元以2 20万元以下D．10万元以上30万元以下 查看答案