问题
单项选择题
根据已建成的性质类似的建设项目的生产能力和投资额与拟建项目的生产能力，来估算拟建项目投资额的估算法是( )。
A．单位生产能力指数法
B．生产能力指数法
C．比例估算法
D．系数估算法
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
根据已建成的性质类似的建设项目的生产能力和投资额与拟建项目的生产能力，来估算拟建项目投资额的估算法是( )。
A．单位生产能力指数法
B．生产能力指数法
C．比例估算法
D．系数估算法
参考答案：B
| 阅读理解。 |
| Recently a really strange thing happened at Wuhan Liangdaojie Middle School in Hubei. Over 600 Junior 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 by taking 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. "You had to put so much attention to it," said the 13-year-old boy, "I now understand how much my parents have 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 their love 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 eggs D. 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. |
在一次实验课上，小宇同学探究氢氧化钠溶液与稀硫酸能否发生反应的实验中，请你一起完成下列问题．
活动与探究：小字同学发现向氢氧化钠溶液中滴加几滴酚酞试液，溶液变成红色，当向该溶液中连续滴加一定量的稀硫酸后，红色又褪去，得到无色溶液．根据实验现象，你认为氢氧化钠溶液与稀硫酸______（填”能”或”不能”）发生化学反应，理由是 氢氧化钠溶液呈碱性，能使酚酞变红，而红色消失说明溶液的碱性消失，也说明氢氧化钠与硫酸发生了化学反应生成了其他不显碱性的物质；
猜想与假设：针对上述所得无色溶液，你还想探究的问题有______；
方案与验证：小明同学设计如下实验继续探究：
| 实验步骤 | 实验现象 | 实验结论 |
| 取少量无色溶液于试管中，滴加氯化钡溶液 | 产生白色沉淀 | 反应后的溶液中还有硫酸剩余 |
如果小明的实验结论正确，你认为在他的探究实验中应当如何改正？请将你的设计填人下表
| 实验步骤 | 实验现象 | 实验结论 |
| 反应后的溶液中还有硫酸剩余 |