问题 单项选择题

如图为植物光合作用强度随光照强度变化的坐标图,下列叙述中不正确的是()。

A.a点叶肉细胞产生ATP的细胞器只有线粒体

B.b点植物光合作用强度与细胞呼吸强度相等

C.当植物缺镁时,b点将向左移

D.己知某植物光合作用和细胞呼吸最适温度分别为25℃和30℃,如图表示该植物处于25℃环境中,则将温度提高到30℃时,a点上移,b点右移,d点上移

答案

参考答案:C

解析:a点只进行细胞呼吸,A正确。b点植物氧气释放量为0,即光合作用释放的氧气刚好被细胞呼吸利用,B正确。缺镁时,叶绿素合成下降,利用光能能力下降,植物需要较强光照才能达到与细胞呼吸速率相等的光合强度,b点右移,C错误。植物处于25℃环境中,则将温度提高到30℃时,光合强度下降,呼吸强度上升,故a点表示呼吸强度上移.b点表示净光合速率为0,即需要较强光照才能达到与呼吸速率相等的光合速率,右移:d点表示最大净光合速率,由于呼吸速率上升,故上移,D项正确。

单项选择题
单项选择题

She was French; he was English; they had just moved to London from Paris. When he found out about her affair, she begged for a reconciliation. He was more ruthless: the same afternoon, he filed for divorce in France, one of the stingiest jurisdictions in Europe for the non-earning spouse and where adultery affects the court’s ruling. Had she filed first in England her conduct would have been irrelevant, and she would have had a good chance of a large share of the marital assets, and even maintenance for life.

International divorce is full of such dramas and anomalies, so the natural response of policymakers is to try to make things simpler and more predictable. But the biggest attempt in recent years to do just that, in a European agreement called Rome Ⅲ, has just been shelved. Instead, several EU countries are now pressing ahead with their own harmonisation deal. Many wonder if it will work any better.

At issue is the vexed question of which country’s law applies to the break-up of a mixed marriage. The spouses may live long-term in a third country and be temporarily working in a fourth. The worst way to sort that out is with expensive legal battles in multiple jurisdictions.

The main principle at present is that the first court to be approached hears the case. Introduced in 2001, this practice has worked well in preventing international legal battles, but has made couples much more trigger-happy, because the spouse who hesitates in order to save a troubled marriage may lose a huge amount of money. Rome III aimed to remove the incentive to go to court quickly. Instead, courts in any EU country would automatically apply the local law that had chiefly governed the marriage. This approach is already in force in countries such as the Netherlands. A couple that moved there and sought divorce having spent most of the marriage in France, say, would find a Dutch court dividing assets and handling child custody according to French law.

That works fine among continental European countries where legal systems, based on Roman law, leave little role for precedent or the judge’s discretion. You can look up the rules on a website and apply them. But it is anathema in places such as England, where the system favours a thorough (and often expensive) investigation of the details of each case, and then lets judges decide according to previous cases and English law.

Another snag is that what may suit middle-class expatriates in Brussels (who just happened to be the people drafting Rome Ⅲ) may not suit, for example, a mixed marriage that has mainly been based in a country, perhaps not even an EU member, with" a sharply different divorce law. Swedish politicians don’t like the idea that their courts would be asked to enforce marriage laws based on, say, Islamic sharia.

The threat of vetoes from Sweden and like-minded countries has blocked Rome Ⅲ. But a group of nine countries, led by Spain and France, is going ahead. They are resorting to a provision in EU rules-never before invoked-called " enhanced co-operation" This sets a precedent for a "multi-speed’" Europe in which like-minded countries are allowed to move towards greater integration, rather than seeking a "big-bang" binding treaty that scoops up the willing and unwilling alike. Some countries worry that using enhanced co-operation will create unmanageable layers of complexity, with EU law replaced by multiple adhoc agreements.

The real lesson may be that Rome III was just too ambitious. A more modest but useful goal would be simply to clarify the factors that determine which court hears a divorce, and then let that court apply its own law. David Hodson, a British expert, proposes an international deal that would start by giving greatest weight to any prenuptial agreement, followed by long-term residency, and then take into account other factors such as nationality. That would then make it easier to end marriages amicably, with mediation and out-of-court agreement, rather than a race to start the beastly business of litigation.

What is the ultimate problem with Rome Ⅲ according to the author’()

A.It is not passed in all the member countries in EU

B. Important amendments fail to be applied to make it more applicable

C.Its rules are not applicable in all the member countries

D. It is too ambitious to encompass all the issues that may occur in Europe, thus lacking of feasibility in specific cases