巨幼细胞性贫血病因主要是（ ）或（ ）缺乏。

小丽是个性格外向的女孩，整天风风火火，和男同学打成一片。对此有人说，男女同学不能交往；有人说，男女同学正常交往有好处；有人说，男女同学交往不能太过分。

（1）你认为小丽的做法对吗？为什么？

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（2）男女同学正常交往有哪些好处？

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（3）你认为男女同学在交往中要注意哪些问题？

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下列生物新个体的产生，属于无性生殖的是（　　）

A．蛙的受精卵发育成蝌蚪

B．草履虫通过分裂产生新个体

C．蚕蛾产下受精卵发育成蚕

D．母狗产下小狗

“努力实现居民收入增长和经济发展同步、劳动报酬增长和劳动生产率提高同步”是“十二五”时期我国经济社会发展的主要目标之一。这“两个同步增长”[ ]

①意味着国家经济实力增强，百姓将分享发展成果

②意味着随经济建设的发展，居民各种收入将超过国家财政收入

③有利于实现社会公平，保障居民收入在国民收入中占合理比重

④有利于完善分配格局，使分配政策成为国家财政收入的增长点

A、①②

B、②③

C、①③

D、②④

合同控制的作用之一是了解合同的实施情况，找出偏离，以便及时采取措施，调整合同实施过程，达到（）。

A．项目总要求

B．合同总要求

C．项目总目标

D．合同总目标

While some international couriers are showing signs of exhaustion, EMS (Express Mail Service), the generic name for the courier services of post offices, seems to be finding its stride. Known as Datapost in Britain, as Chronopost in France, and as A1-Barid al-Mumtaz in Saudi Arabia, EMS is now second in the international courier business (jointly with TNT Skypack). Last year it delivered 5.6 million items, weighing less than 20 kilograms each, across borders. That and its annual growth rate of around 5 percent have worried DHL, the market leader, enough for it to counter-attack in the Courts.
On October 26, a Dutch judge ruled against DHL on all three counts filed against the Dutch post office: that the three-initial name was too close to DHL’s; that the orange lines in the EMS logo were too similar to DHL’s dark red ones; and that the claim to the widest route system in the world was unfounded. DHL has threatened the Swiss post office with similar action, but it may reconsider after the Dutch ruling.
EMS has some advantages over the private couriers. One is a dense ready-made network of offices, especially in Europe, the avowed target area of the private couriers. Another advantage is a long tradition of working with customs authorities. In a business where minutes count, it pays to have good friends at customs. That advantage particularly irritates the private couriers because there is no legal way to combat such unquantifiable coziness.
The private courier services are also annoyed because in countries like Switzerland and Italy, where the post office is officially a monopoly, they pay it a fee. In Switzerland DHL says it pays more than SFr lm ($ 708,000) "to the competition" each year. In France the couriers have won a battle for exoneration.
Although governments are under little pressure to keep prices artificially low, EMS is often cheaper than the private couriers, but not always. A recent test in Britain (on a domestic route) showed Datapost about halfway between the least and the most expensive, but gave it full marks for speed and service.
Each national EMS is free to set its rates and follow its own rules on things like bulk discounts. The Universal Postal Union, based in Berne, determines how costs and revenues are split between sending and receiving countries, and standardizes procedures. More than 100 postal administrations have linked into the system—and more are coming, including Russia’s. That makes the feisty EMS particularly happy since its rivals have not been allowed to serve anywhere in Russia.

Which of the following is true of DHL according to the passage

A. It cooperates with TNT Skypack.
B. It is showing signs of exhaustion.
C. It might have a leading position in the international courier business.
D. It has an annual growth rate of 5%.