问题
单项选择题
建设项目在进行可行性研究时,生产经营单位应当分别对其安全生产条件进行论证和安全预评价的是( )。
A.煤矿山建设项目
B.生产、储存危险化学品的建设项目
C.化工、冶金、有色、建材、机械、轻工、纺织、烟草、商贸、军工、公路、水运、轨道交通、电力等行业的国家和省级重点建设项目
D.生产、储存烟花爆竹的建设项目
答案
参考答案:A
建设项目在进行可行性研究时,生产经营单位应当分别对其安全生产条件进行论证和安全预评价的是( )。
A.煤矿山建设项目
B.生产、储存危险化学品的建设项目
C.化工、冶金、有色、建材、机械、轻工、纺织、烟草、商贸、军工、公路、水运、轨道交通、电力等行业的国家和省级重点建设项目
D.生产、储存烟花爆竹的建设项目
参考答案:A
Nowadays green food is popular. We know we need green food and good health, not all people knew that years ago. When I was in Grade Seven, my teacher asked us to something about green food by ourselves. We didn’t have any idea at first. Then our four-member group had a and decided to do some research(调查) in a supermarket. Two of us wrote down the names of the food on the shelves(货架). The other two customers(顾客) some questions like “Do you know what green food is? ” “How often do you green food?” and so on. More than 30 customers our questions! Later each group in our class wrote a research report the topic and handed it in(交上). Our teacher chose the ones and put them up on the wall of the classroom. was one of them! We not only learned a lot about green food but also knew how to keep healthy.
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(5分)某生物兴趣小组的三个同学对植物种子萌发所需的条件都很感兴趣,于是他们三人分工合作,都以大豆为实验材料进行探究。现将他们的实验设计与数据结果整理于下表。请认真分析表格内容,回答有关问题:(表中未说明部分,均认为条件适宜)
学生名称 | 装置标号 | 温度(℃) | 湿度 | 光照 | 种子数 | 发芽率(%) |
甲 | A | 25 | 潮湿 | 有光 | 100 | 96 |
B | 8 | 潮湿 | 有光 | 100 | 0 | |
乙 | C | 25 | 干燥 | 无光 | 100 | 0 |
D | 25 | 潮湿 | 无光 | 100 | 98 | |
丙 | E | 25 | 潮湿 | 有光 | 5 | 100 |
F | 25 | 潮湿 | 无光 | 5 | 100 |
(2)乙同学实验设计的对照组是 ▲ 。
(3)丙同学设计的实验与甲乙两同学的相比,不足之处是 ▲ 。
(4)从甲乙丙三位同学的实验结果可以得出的结论是 ▲ 。
(5)在适宜的条件下,A、D二组均有未萌发的种子,可能的原因是 ▲ 。