下列叙述中正确的是 [ ] A.NH3、CO、CO2都是极性分子 B.CH4、C

题型:选择题

问题:

下列叙述中正确的是 [ ]

A.NH3、CO、CO2都是极性分子

B.CH4、CCl4都是含有极性键的非极性分子

C.HF、HCl、HBr、HI的稳定性依次增强

D.CS2、H2O、C2H2都是直线形分子

考点:元素周期律极性分子、非极性分子无机分子的立体结构极性键、非极性键
题型:选择题

我国国民经济的基础产业是(  )

A.旅游业

B.工业

C.交通运输业

D.农业

题型:选择题

根据《建筑地基处理技术规范》JGJ 79—2002,地基处理施工结束后,应间隔一定时间方可进行地基和加固体的质量检验,下列选项中有关间隔时间长短的比较哪些是不合理的

A.振冲桩处理粉土地基>砂石桩处理砂土地基

B.水泥土搅拌桩承载力检测>振冲桩处理粉土地基

C.砂石桩处理砂土地基>硅酸钠溶液灌注加固地基

D.硅酸钠溶液灌注加固地基>水泥土搅拌桩承载力检测

题型:选择题

二岁以下儿童肠梗阻常见的病因是()。

A.嵌顿性斜疝

B.先天性肠道闭锁或无肛

C.先天性肠旋转不良

D.急性肠套叠

E.胎粪性腹膜炎

题型:选择题

网络广告的核心思想在于()

A.有价值的信息

B.服务载体

C.引起用户关注

D.促使用户点击

题型:选择题

Here is a quick way to spoil a Brussels dinner party. Simply suggest that world governance is slipping away from the G20, G7, G8 or other bodies in which Europeans may hog up to half the seats. Then propose, with gloomy relish, that the future belongs to the G2: newly fashionable jargon for a putative body formed by China and America.

The fear of irrelevance haunts Euro-types, for all their public boasting about Europe’s future might. The thought that the European Union might not greatly interest China is especially painful. After all, the 21st century was meant to be different. Indeed, to earlier leaders like France’s Jacques Chirac, a rising China was welcome as another challenge to American hegemony, ushering in a “multipolar world” in which the EU would play a big role. If that meant kow-towing to Chinese demands to shun Taiwan, snub the Dalai Lama or tone down criticism of human-rights abuses, so be it. Most EU countries focused on commercial diplomacy with China, to ensure that their leaders’ visits could end with flashing cameras and the signing of juicy contracts.

Meanwhile, Europe’s trade deficit with China hit nearly∈170 billion ( $ 250 billion) last year. In five years, China wants 60% of car parts in new Chinese vehicles to be locally made. This is alarming news for Germany, the leading European exporter to China thanks to car parts, machine tools and other widgets.

As ever, Europeans disagree over how to respond. Some are willing to challenge China politically — for example, Germany, Britain, Sweden and the Netherlands. But they are mostly free traders. That makes them hostile when other countries call for protection against alleged Chinese cheating. In contrast, a block of mostly southern and central Europeans, dubbed “accommodating mercantilists” by the ECFR (The European Council on Foreign Relations), are quick to call for anti-dumping measures: But that makes them anxious to keep broader relations sweet by bowing to China on political issues.

The result is that European politicians often find themselves defending unconditional engagement with China. The usual claim is that this will slowly transform the country into a freer, more responsible stakeholder in the world. The secret, it is murmured, is to let Europe weave China into an entangling web of agreements and sectoral dialogues. In 2007 no fewer than 450 European delegations visited China. Big countries like France and Britain add their own bilateral dialogues, not trusting the EU to protect their interests or do the job properly. There are now six parallel EU and national “dialogues” with China on climate change, for example.

What is European “fear of irrelevance”()

A. Europeans may not play big role in the future

B. The USA may not be interested in Europe

C. China is developing too fast to control

D. The EU may not include all European countries

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