通常不会发生恶变的是()A．囊性水瘤(大囊型淋巴管畸形) B．鳃裂囊肿 C．角化囊肿

19世纪末20世纪初，电子和放射性的发现，打开了原子的大门，使人们对物质的认识深入到了原子内部。但大量的实验表明，微观粒子的运动不能用通常的宏观物体的运动规律进行描述。弥补经典力学在认识微观世界方面不足的是：  [ ]

A．牛顿力学定律

B．爱因斯坦相对论

C．量子理论

D．生物进化论

某跨海大桥工程环境影响评价工作根据《环境影响评价法》和《环境影响评价公众参与暂行办法》，进行公示，并进一步征求公众意见。第一期公告发布后，建设业主根据有关意见和建议，对该大桥线位和桥型进行了调整。调整后线位起于A路上，线路经过某新型建材有限公司和开发区后，跨过一级公路，穿过山坡向东转向某村平地展线。全长12.84km，其中桥梁长度11.13km。大桥主线采用双向四车道高速公路标准，设计行车速度100km/h。施工期4年，工程总投资约31.16亿元。工程永久和临时占地约115hm²，果树林草植被破坏面积约75hm²，占用浅海和滩涂海域约19hm²。工程施工无水下爆破影响。大桥距白鹭和白海豚自然保护区最近距离分别约有4.5km和9km以上，大桥虽从红树林和河口湿地自然保护区边缘通过，但可采取桥墩避开和桥梁跨越红树林带措施，所占用属于河口湿地自然保护区实验区的湿地很少，工程建设对红树林、白鹭和白海豚影响较小。工程建设虽对海陆生物生境、渔业养殖和动植物、湿地、土地资源有一定的影响，但对生物多样性影响不大，不会明显造成生态完整性和稳定性的破坏。

对于环境风险影响表述正确的有（）。

A.施工期水上存在溢油入海事故风险

B.营运期桥下船舶存在溢油入海事故风险

C.营运期桥上车辆存在运输危险品泄漏入海事故风险

D.营运期桥下船舶存在运输危险品泄漏入海事故风险

阅读理解

    The sea has always interested man.From it he can get food, minerals, and treasure.For thousands of

years, he could sail on it.But he could not go far beneath its surface.

     Man wants to explore deep into the sea.However, he is not a fish.He must breathe air, so he can't

stay under the water's surface for any length of time.To explore deep water, man faces even more

dangers and problems.

     A diver who wants to stay under water for more than a few minutes must breathe air or a special

mixture of gases.He can wear a diving suit and have air pumped to him from above.He can carry a tank

of air on his back and breathe through a nose and a mouthpiece.Water weighs 800 times as much as air.

Tons of water pushes against a diver deep in the sea.His body is under great pressure.

     When a diver is under great pressure, his blood takes in some of the gases he breathes.As he rises to

surface, the water pressure becomes less.If the diver rises too quickly, the gases in his blood form

bubbles.The diver is then suffering from the bends.The bends can cause a diver to double up in pain.They

can even kill him.

1. On the whole, this passage is about ________.

A. special mixtures of gases in deep sea

B. the problems man faces in deepsea diving

C. air pressure under the surface of sea water

D. a kind of illness that man suffers in the sea

2. A diver's body in deep water ________.

A. is under great pressure

B. is just like that of a fish

C. suffers from the bends

D. weighs very little

3.  The passage does not say so, but it makes you think that ________.

A. deepdivers should be in good health

B. divers explore the deep sea only for treasure

C. diving under the water too quickly causes a kind of illness

D. there is a special mixture of gases under the sea

4. From the passage we can see that ________.

A. the sea began to interest man a few years ago

B. man is not at home deep in the sea

C. all divers will get the bends sooner or later

D. the air in the sea water will kill a diver if he is not careful

男，72岁，排尿困难5年，近2个月加重伴食欲不振。直肠指诊前列腺明显增大5～6cm，叩诊膀胱脐下3横指。B超示双肾中度积水。下面哪一种治疗最为合理（）

A.耻骨上经膀胱前列腺切除术

B.经 * * 前列腺切除术

C.服用α受体阻滞剂和5α还原酶抑制剂

D.留置导尿管或耻骨上膀胱穿刺造瘘

E.经 * * 前列腺热疗