沐浴前多少时间可以练习瑜伽（）A.25分钟 B.20分钟 C.15分钟 D.30分钟

当细菌外毒素再次侵入人体后，主要是体液免疫发挥作用，其“反应阶段”和“效应阶段”的免疫过程分别是[ ]

A．B细胞→效应B细胞，释放免疫活性物质消灭外毒素

B．效应B细胞→产生抗体，特异性抗体与外毒素结合

C．记忆细胞→效应T细胞，释放免疫活性物质消灭外毒素

D．记忆细胞→效应B细胞，产生特异性抗体与外毒素结合

患者男性，28岁，因“被汽车撞伤踝部2小时”来诊。患者被撞后，当即感踝部疼痛、活动受限，无昏迷、呕吐。查体：意识清，踝部肿胀，畸形，有异常活动和骨擦音，纵向叩击痛明显。患肢远端血液循环及感觉正常。X线片：三踝骨折。

根据骨折发生的原因三踝骨折可分为（）

A.内翻骨折

B.外翻骨折

C.内旋骨折

D.外旋骨折

E.垂直压缩骨折

F.无移位骨折

The United Nations says forty million people or so around the world went hungry in 2008, mainly because of higher food prices. Early estimates from the UN Food and Agriculture Organization (FAO) show that 963 million people did not get enough to eat.

World food prices have dropped since early 2008. Prices of major crops have decreased by more than half from their height earlier last year. But they remain high compared to earlier years.

But FAO official Hafez Ghanem says lower prices have failed to end the food crisis (危机) in many poor countries. “For millions in developing countries,” he says, “getting enough food every day to live an active and healthy life is a distant dream. ”

The FAO says food shortage is a threat to people's health. Today, two-thirds of the world's undernourished people live in just a few countries. These are India, the Democratic Republic of Congo, Bangladesh, Indonesia, Pakistan, Ethiopia and so on.

A report on food insecurity warns that the current economic crisis could send even more people into hunger and poverty.

In sub-Saharan Africa, the percentage of the people who continually go hungry fell from 34% in 1997 to 30% in 2008. But the FAO says Ghana is the only country that has reached two sets of hunger reduction targets. These were set by the 1996 World Food Summit and the Millennium Development Goals. The main reason is the growth in agricultural production in Ghana.

The FAO says some countries in Southeast Asia like Thailand and Vietnam have made progress in hunger reduction goals. But South Asia and Central Asia haven't, and North Korea is still in hot water.

小题1:What FAO official Hafez Ghanem says implies（暗示）__________

A．it's easy but takes long to provide people with enough food

B．enough food can make people more active and healthier

C．there is difficulty solving the food shortage in a short time

D．people in developing countries will never get enough food小题2:The underlined word "undernourished" in Para. 4 probably means ________.

A．hungry and unhappy

B．unhealthy for lack of food

C．not fat because of poverty

D．undeveloped and poor小题3:What is the best title of this passage?

A．The food production of the world

B．The hunger reduction target of the FAO

C．The food shortage around the world

D．The solution to the global food shortage

ary是美国公民，在美国的ABE公司工作。2005年，ABC公司将Mary调派到其在北京的合资企业甲公司担任技术总监，负责某项目的实施。Mary6月5日抵达北京，6月8日正式上任。Mary将在北京持续工作3年，期间，可以回国探亲一次，时间不超过10天。Mary调到北京以后，美国公司将负担其每月的工资4000美金，北京的合资公司额外负担其在北京的生活补助每月30000元人民币。2005年12月，Mary在北京工作22天，圣诞期间回国探亲9天。当月，还收到甲公司支付的120000元人民币的年终奖金。

要求：计算Mary2005年12月应该在中国缴纳的个人所得税。

（注：假设美元兑人民币的汇率均为1美元：8元人民币）

按热力学方法分类，相变可以分为一级相变和二级相变，一级相变是在相变时两相化学势相等，其一阶偏微熵不相等，因此一级相变（）。

A.有相变潜热，无体积改变

B.有相变潜热，并伴随有体积改变

C.无相变潜热，并伴随有体积改变

D.无相变潜热，无体积改变