药物离子导入皮肤的深度是（） A.1mm以下 B.1～1.5mm C.2mm D.2

（12分）I．在浓CaCl₂溶液中通入NH₃和CO₂，可以制得纳米级碳酸钙和一种氮肥。请根据要求答问题：

（1）写出该反应的化学方程式                                        。

（2）如何判断所得碳酸钙是否为纳米级                                 。

Ⅱ．某实验小组设计下图装置测定SO₂转化成SO₃的转化率。已知SO₃的熔点16．8℃，沸点是44．8℃。已知发生装置中反应的化学方程式为：

Na₂SO₃（s）+H₂SO₄Na₂SO₄+SO₂↑+H₂O

（1）根据实验需要，请从下图A～E装置中选择最适合装置，连接在I、Ⅱ、Ⅲ处。

Ⅰ           Ⅱ           Ⅲ          。

（2）在检查完装置气密性后，从乙处均匀通入O₂，在实验中先加热催化剂后滴加浓硫酸，这样操作后在装置I和装置Ⅱ之间发生的反应的化学方程式                   。

（3）发生装置的分液漏斗上接橡皮管甲的目的是                               。

（4）用126g Na₂SO₃粉末与足量浓硫酸进行实验，当反应结束时，继续通入O₂一段时间，若测得装置Ⅲ增重了51．2g，则实验中SO₂的转化率为               。

Every second in the United States alone, more than 250 animals are slaughtered for food, adding up to more than 8 billion animals each year. Reducing the amount of meat in one’s diet is nutritionally, environmentally, and ethically beneficial.

People who eat meat usually have weaker immune systems compared to those of vegetarians. Meat has been directly linked to diabetes, obesity, arthritis, and many other illnesses. Furthermore, meat-eaters are at a higher risk for diseases, including cancer, and they are more likely to die from these diseases. Critics say that a meatless diet does not provide enough nutrients, especially protein and iron. Actually, according to A Teen’s Guide to Going Vegetarian, by Judy Krizmanic, protein is found in almost every food, and iron appears in many vegetables. Getting enough nutrients in a meat-reduced diet should not be difficult. A 1988 study found that some of the highest pesticide residues appear in meat and eggs. Diets including more fruits and vegetables will only make people healthier.

Some skeptics believe that there will be a shortage of food if animals are not eaten. In fact, the opposite is true. More than 80% of the corn and 95% of the oats grown in the US are fed to livestock. The world’s cattle alone consume enough food to equal the caloric needs of 8.7 billion people, more than the entire human population. One half of the water used in the Unites States also goes to livestock; 2.50 gallons of water produces only 1 pound of beef. If people eat less meat and more plants, the amount of available food will increase.

Many people become vegetarians because they feel that eating animals is unethical. 90% of these animals are raised in confinement. Chickens and other birds have only about half. a square foot of space each, and since they are raised so close together, a hot blade is used to cut off their beaks to prevent them from pecking each other to death. Likewise, pigs that are repressed will bite each other’s tails, so both their teeth and tails are removed as soon as they are born.

Eating animals is hazardous in numerous ways. Even a slight reduction in meat intake is better than nothing at all. Consuming less meat is beneficial to the health of animals, the health of people, and to the health of the world.

In the third paragraph, the author implies that（）

A. food will be insufficient if animals are not eaten

B. lots of food and water are consumed by cattle

C. a meat-reduced diet is environmentally beneficial

D. animals are raised for human food

2011年5月23日是西藏和平解放60周年。60年来，西藏各族干部群众同心同德、艰苦创业，使西藏的面貌发生了历史性变化。当前的西藏经济发展、社会进步、文化繁荣、民族团结、政通人和。这是因为（）。

A.我国实行民族区域自治政策加快西藏地区的经济文化发展

B.我国已经实现了各民族平等、团结和共同繁荣

C.我国已确立平等、团结、互助、和谐的社会主义民族关系

D.藏族等少数民族自主管理本民族、本地区的内部事务

船员发现火灾应立即（）.

A、利用就近的灭火器材灭火

B、按应变部署表准备器材

C、报告值班驾驶员

D、发出消防警报

下列说法哪些是正确的（）。

A．对于水溶性甲、乙、丙类液体火灾，必须采用液上喷射泡沫方式，且必须选用抗溶性泡沫液

B．对于非水溶性甲、乙、丙类液体火灾，当采用固定顶储罐时，可以采用液上喷射泡沫方式，也可以采用液下喷射泡沫方式

C．对于非水溶性甲、乙、丙类液体火灾，采用液上喷射泡沫方式时，可以选用蛋白、氟蛋白、水成膜或成膜氟蛋白泡沫液

D．对于非水溶性甲、乙、丙类液体火灾，采用液下喷射泡沫方式时，必须选用氟蛋白、水成膜或成膜氟蛋白泡沫液

E．内浮顶储罐和外浮顶储罐不应选用液下喷射泡沫方式