老师让生物小组的4名同学每人举1个例子,说明生物能够适应环境,其中错误的是[ ]

题型:选择题

问题:

老师让生物小组的4名同学每人举1个例子,说明生物能够适应环境,其中错误的是[ ]

A.生活在沙漠中的仙人掌,叶退化成刺

B.企鹅背面的黑色与深色海水一致

C.生活在雪地的老鼠毛色为白色

D.蚯蚓的活动和取食使土壤变得更加疏松

考点:生物与环境的相互作用
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当拟采购项目的详细资料难以得到时,估计招标采购项目总费用较有效的方法是()。

A.自上而下估计法

B.自下而上估计法

C.类比估计法

D.抽样调查统计法

题型:选择题

Is learning a foreign language ever easy? Yes. If you are five and move to another country, you will quickly pick up the language. But what about for the rest of us who are no longer five, and need to be polite when traveling for business or for pleasure? I think that answer is also yes. Language learning can be easy if you don’t want or need to learn too much.

The key to successful language learning in my mind is not to set the goal too high. It is rather like running. Even if you run twice a week, you don’t necessarily want to be able to run a marathon (马拉松). You might just want to keep a level of fitness. I think the same can be true for language learning.

Let’s get back to the goal. If you decide to learn ten words in a foreign language before visiting the country, you know that you will be sure to do this. However, if you decide to talk to people with great fluency (流利), unless you are quite a talented person, you will probably fail and give up in half-way.

It is also far easier to start learning a foreign language than to finish. In other words, the better you are, the slower it can be to improve, because you will not be able to move further because of grammar, making sentences, learning less common words, etc. If you are only trying to learn a few foreign words and sentences, you will enjoy faster progress, have more fun, and won’t have to spend too much time.

The idea of learning only a few hundred words in a language, and then stopping, isn’t the usual way to language learning, but it can be a very meaningful and enjoyable activity.

小题1:In the writer’s opinion, it is easy for adults to learn English if _______.

A.they are especially talented people

B.they don’t want or need to learn too much

C.they have to spend a lot of time on it

D.they have a chance to go abroad小题2:The writer believes that if you want to be good at a foreign language, you will probably _______.

A.forget your own goals

B.become a talented language learner

C.get tired of learning it

D.reach your learning goal小题3:The best title of this passage would be _______.

A.Easy Language Learning

B.Hard Language Learning

C.Fluency in a Foreign Language

D.A way of Language Learning

题型:选择题

已知某厂每天排出10000 m3尾气(已折算为标准状况),内含0.268%(体积分数)的SO2,SO2可完全转化为H2SO4,若用黄铁矿来生产同样多的H2SO4,则需要多少克含FeS2

78.2% 的黄铁矿?

题型:选择题

机动车在高速公路发生故障需停车检查时,要在什么地方停车

A.最外侧行车道上

B.内侧行车道上

C.应急车道

D.匝道口

题型:选择题

我是一名退休干部,现打算变更定点医疗机构,不知如何操作?可以委托他人代办吗?

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