某校六年级(12岁年龄组)280名学生中恒牙有龋、失、补的人数为150人，未治

帕金森病以下哪项诊断及治疗的表述是正确的()

A．脑脊液检查对诊断颇有价值

B．MRI检查有特征性表现

C．PD一经确诊应首选左旋多巴治疗

D．美多巴是由左旋多巴加苄丝肼组成，疗效优于左旋多巴

E．服用左旋多巴出现周围性副作用时应立即停药

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。 选项中有两项为多余选项。

The sea has always interested man. From it he can get food, minerals, and treasure.   小题1:   But he could not go far beneath its surface.

  小题2:   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.   小题3:   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.   小题4:  

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(气泡). The diver is then suffering from the bends(潜水夫病). The bends can cause a diver to double up in pain.    小题5: 

A．His body is under great pressure.

B．Scientists are trying to find more about the sea.

C．For thousands of years, he could sail on it.

D．They can even kill him.E. He can wear a diving suit and have air pumped to him from above.

F. The water pressure can cause a diver to breathe with difficulty.

G. Man wants to explore deep into the sea.

材料一：2008年8月8日晚8时8分，第二十九届夏季奥运会在北京的国家体育场－－“鸟巢”隆重开幕。

材料二：北京时间9月25日21时10分04秒，我国航天事业又迎来一个历史性时刻，我国自行研制的神舟七号载人飞船在酒泉卫星发射中心发射升空，21时19分43秒准确进入预定轨道。在随后的飞行过程中，我国航天员将首次进行空间出舱活动。

材料三：载人航天本身具有极大的科技经济价值，美国的一项测算表明，在航天领域每投入1元钱，可以带来9元钱的收益。

请运用经济生活的有关知识回答：举办北京奥运会和我国载人航天飞行圆满成功，对我国的经济意义？

关于支撑线和压力线，下列说法不正确的是（）。

A.支撑线又称为抵抗线

B.支撑线总是低于压力线

C.支撑线起阻止股价继续上升的作用

D.压力线起阻止股价下跌或上升的作用