在“三化”的环境下,国内企业在面临“机遇”的同时,也将迎接如下挑战()。 A.市场竞

题型:多项选择题

问题:

在“三化”的环境下,国内企业在面临“机遇”的同时,也将迎接如下挑战()。

A.市场竞争更加激烈

B.对手越来越多、越来越强

C.对服务要求越来越高

D.劳动力价格低、文化背景熟悉

考点:经济学ERP原理与应用综合练习ERP原理与应用综合练习题库
题型:多项选择题

将Fe2O3和纯净的碳粉混合,平铺在反应管a中在瓶盛有足量澄清石灰水按图连接仪器.实验开始时缓慢通入氮气过一段时间后,加热反应管观察到管内发生剧烈反应同时,瓶中的溶液出现白色沉淀待反应反应完成后停止加热仍继续通入氮气直至反应管冷却.此时,管内的混合物变成黑色粉末.

回答问题:

(1)取少量固体溶于足量的稀硫酸,发现有大量的气泡产生,若同时出现 ____    _____ 的现象,则生成的黑色固体全部是铁.

(2)实验中通入的气体是纯净干燥的氮气,不用空气的主要原因是 ____             _____

(3)停止加热前是否需要断开和b的连接处?为什么? __                                   _______

(4)本实验的尾气是否需要处理?如需处理,请回答如何处理,如不需处理,说明理由 _______                                                                            __

(5)合成氨工业中使用的催化剂铁触媒的成分可表示为xFeOyFe2O3(其中FeO与Fe2O3质量比为27:20).若用40gFe2O3通过该实验制备出37.6g铁触媒,反应中消耗的纯净碳粉的质量范围是 _________ ,x:y= _________

题型:多项选择题

关于红外线叙述哪一项是错误的()

A.红外线是太阳辐射波长最长的一种电磁波

B.红外线主要生物学作用是使机体产生热效应

C.红外线可促进新陈代谢,有消炎、镇痛作用

D.红外线为可见的红光

E.过量的红外线照射可引起皮肤烧伤、白内障及中暑

题型:多项选择题

Let’s say you have a piece of wood, a nail, and a hammer. Pretend the wood is a person, and the nail is a mean rumor(谣言) about that person. If you hammer in the nail, you’re obviously hurting him or her. If you then pull out the nail, there’s still a hole in the wood, and the damage has been done.

There are many reasons why that nail of a rumor can be so harmful. Rumors are, quite simply, a form of bullying(欺侮). When a person or a group makes up a rumor about someone or decides to spread gossip, it’s usually to hurt someone, break up a friendship, or make someone less popular. It’s the same thing as teasing, only it’s done behind someone’s back instead of to his or her face.

When you spread a rumor about someone, you’re sending a signal that the person is outside of the group, and somehow less worthy of friendship than others. You’re making fun of that person or pointing out negative things about him or her. This can let others think that it’s okay to make the person feel bad, and make him or her an outsider.

We need to be able to trust our friends, and gossip and rumors can break this trust. If you tell a personal secret to a friend, and he turns around and tells it to someone else, you might feel like you will get burned if you ever get close to him again.

Letting a rumor influence your behavior is like letting someone else make a big decision for you. Let’s say you hear that the teacher plans to call a Snow Day tomorrow because a blizzard (暴风雪) is coming. Expecting a day off, you don’t do your homework. The next morning, the blizzard turns out to be nothing more than a drizzle(毛毛雨), and school isn’t off after all. You get zeroes on your work.

小题1:To tell a rumor and a tease apart, you depend on ______.

A.whether it is done behind someone

B.whether it is painful or not

C.whether it is a kind of bullying

D.whether it is spread fast.小题2:If a rumor is spread about someone, others may_______.

A.point out his or her advantages

B.keep away from him or her

C.not feel he or she is an outsider

D.be hurt if getting close to him or her again.小题3:The purpose of this passage is to _______.

A.advise on how to deal with rumors

B.teach us how to judge a rumor

C.find out why rumors spread fast

D.explain why rumors hurt

题型:多项选择题

理性综合模型所依据的假定是人们在决策的时候,根据的是有关于()的理性计算。

A.时间和费用

B.时间和收益

C.质量与效益

D.成本与效益

题型:多项选择题

某生以优异成绩考入某生重点中学,全家人都对他给予了厚望,,为了不辜负父母的期望,他每天睡眠时间只有5个小时,结果两年后,他退学了。下列说法正确的是()。

A.从学习行为上讲,该同学的意志力坚强,值得提倡

B.造成退学的原因主要是由于心理压力过大,睡眠时间太少,造成某种严重的心理障碍

C.父母的期望值会对学生产生消极的影响

D.如果该同学积极的惊醒体育锻炼,就不会造成退学的后果

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