申请发行可转换债券时，一定要报送发行人编制的盈利预测报告。( )

A、B、C、D、E是中学常见的几种化合物，A、B是氧化物，元素X、Y的单质是生活中常见的金属，相关物质间的关系如下图所示。

回答下列问题：

（1）X的单质与A反应的化学方程式是________________________________。

（2）若C溶液显碱性，则试剂1是             ____溶液(写化学式)；若C溶液显酸性，则显酸性的原因是(用离子方程式表示)                                  。

（3）若试剂1和试剂2均是稀硫酸。

①检验物质D的溶液中金属离子的方法是                                                     ；

②写出D→E反应的离子方程式                                                ；

③某高效净水剂是由Y(OH)SO₄聚合得到的。工业上以E、稀硫酸和亚硝酸钠(NaNO₂)为原料来制备Y(OH)SO₄，反应中有NO生成，该反应的化学方程式是：                                        。

SO₂、NO₂是大气污染的主要污染物，下列污染现象分别与SO₂、 NO₂有关的是（ ）

A．光化学烟雾、温室效应

B．臭氧空洞、水体富营养化

C．酸雨、光化学烟雾

D．赤潮、温室效应

以下属于知觉障碍的有（）

A.感觉过敏

B.错觉

C.幻觉

D.妄想

下列关于脑卒中病人患侧卧位中错误的是（）

A.患侧上肢前伸，使肩部向前

B.肘关节伸展，前臂旋前，掌心向下

C.手心不应放置任何东西

D.患侧下肢在后，患髋关节微后伸，膝关节略屈曲

E.健侧上肢放于体上或稍后方

Glass, in one form or another, has long been in noble service to humans. As one of the most widely used of manufactured materials, and certainly the most versatile, it can be as imposing as a telescope mirror the width of a tennis court or as small and simple as a marble rolling across dirt.

41. ______

The uses of this adaptable material have been broadened dramatically by new technologies: glass fiber optics—more than eight million miles—carrying telephone and television signals across nations; glass ceramics serving as the nose cones of missiles and as crowns for teeth; tiny glass beads taking radiation doses inside the body to specific organs; even a new type of glass fashioned of nuclear waste in order to dispose of that unwanted material.

42. ______

On the horizon are optical computers. These could store programs and process information by means of light—pulses from tiny lasers—rather than electrons. And the pulses would travel over glass fibers, not copper wire. These machines could function hundreds of times faster than today’s electronic computers and hold vastly more information. Today fiber optics are used to obtain a clearer image of smaller and smaller objects than ever before—even bacterial viruses. Anew generation of optical instruments is emerging that can provide detailed imaging of the inner workings of cells. It is the surge in fiber optic use and in liquid crystal displays that has set the U. S. glass industry (a 16 billion dollar business employing some 150, 000 workers) to building new plants to meet demand.

43. ______

But not all the glass technology that touches our lives is ultra-modem. Consider the simple light bulb; at the turn of the century most light bulbs were hand blown, and the cost of one was equivalent to half a day’s pay for the average worker. In effect, the invention of the ribbon machine by Coming in the 1920s lighted a nation. The price of a bulb plunged. Small wonder that the machine has been called one of the great mechanical achievements of all time. Yet it is very simple: a narrow ribbon of molten glass travels over a moving belt of steel in which there are holes. The glass sags through the holes and into waiting moulds. Puffs of compressed air then shape the glass. In this way, the envelope of a light bulb is made by a single machine at the rate of 66,000 an hour, as compared with 1,200 a day produced by a team of four glassblowers.

44. ______

The secret of the versatility of glass lies in its interior structure. Although it is rigid, and thus like a solid, the atoms are arranged in a random disordered fashion, characteristic of a liquid. In the melting process, the atoms in the raw materials are disturbed from their normal position in the molecular structure; before they can find their way back to crystalline arrangements the glass cools. This looseness in molecular structure gives the material what engineers call tremendous "formability" which allows technicians to tailor glass to whatever they need.

45. ______

Today, scientists continue to experiment with new glass mixtures and building designers test their imaginations with applications of special types of glass. A London architect, Mike Davies, sees even more dramatic buildings using molecular chemistry. "Glass is the great building material of the future, the ’dynamic skin’," he said." Think of glass that has been treated to react to electric currents going through it, glass that will change from clear to opaque at the push of a button, that gives you instant curtains."

Think of how the tall buildings in New York could perform a symphony of colours as the glass in them is made to change colours instantly. Glass as instant curtains is available now, but the cost is exorbitant. As for the glass changing colours instantly, that may come true. Mike Davies’s vision may indeed be on the way to fulfillment.

[A] What makes glass so adaptable

[B] Architectural experiments with glass

[C] Glass art galleries flourish

[D] Exciting innovations in fiber optics

[E] A former glass technology

[F] New uses of glass

44（）