全身强直-阵挛性发作和失神发作合并发生时，药物治疗首选（）。 A.地西泮（安定） B

学生张兵在乘坐无人售票的公交车时，往投币箱里投了八个一角的硬币。他为自己少交了两角钱，却没有被别人发现而暗自高兴。对张兵的行为理解正确的是[     ]

A、父母挣钱不容易，用这种方式省两角钱可以理解

B、是一种非正义的行为

C、如果人人都这样做，会使国家受到严重的损失

D、是不道德的行为

女性，32岁，月经稀发3年，3～5天/2～6个月，现停经5个月。既往月经规律，15岁初潮，3～7／28～32天，已婚5年，未避孕，G₁P₀A₁L₀，4年前人工流产1次，无痛经。

患者出现以下体征可辅助诊断该病（）

A.潮热、出汗

B.多毛、痤疮

C.毛发脱落

D.黑棘皮症

E.肥胖

F.外阴皮肤变薄

G.激动易怒

卫生部规定，我国三级医院无菌手术切口感染率为（）

A.1%以下

B.0.5%以下

C.0.05%以下

D.0.2%以下

E.0.15%

Long before man lived on the Earth, there were fishes, reptiles, birds, insects, and some mammals. Although some of these animals were ancestors of kinds living today, others are now extinct, that is, they have no descendants alive now. Nevertheless, we know a great deal about many of them because their bones and shells have been preserved in the rocks as fossils.

41.______That kind of rock in which the remains are found tells us much about the nature of the original land, often of the plants that grew on it, and even of its climate.

When an animal dies, the body, its bones, or shell, may often be carried away by streams into lakes or the sea and there get covered up by mud. If the animal lived in the sea its body would probably sink and be covered with mud. More and more mud would fall upon it until the bones or shell become embedded and preserved. 42．______Thus it follows that there must be many kinds of mammals, birds, and insects of which we know nothing,

43．______Later forms are more complex, and among these are the sea-lilies, relations of the star-fishes, which had long arms and were attached by a long stalk to the sea bed, or to rocks. There were also crab-like creatures, whose bodies were covered with a horny substance, The body segments each had two pairs of legs, one pair for walking on the sandy bottom, the other for swimming. The head was a kind of shield with a pair of compound eyes, often with thousands of lenses. They were usually an inch or two long but some were 2 feet.

The shellfish have a long history in the rock and many different kinds are known. Of these, the ammonites are very interesting and important. They have a shell composed of many chambers, each representing a temporary home of the animal. As the young grew larger it grew a new chamber and sealed off the previous one. Thousands of these can be seen in the rocks on the Dorset Coast.

The first animals with true backbones were fishes, first known in the rocks of 375 million years ago. About 300 million years ago the amphibians, the animals able to live both on land and in water, appeared. They were giant, sometimes 8 feet long, and many of them lived in the swampy pools in which our coal seam, or layer, formed. 44．______About 75 million years ago the Age of Reptiles was over and most of the groups died out. The mammals quickly developed, and we can trace the evolution of many familiar animals such as the elephant and horse. 45．______

[A] The best index fossils tend to be marine creatures. These animals evolved rapidly and spread over large areas of the world.

[B] The amphibians gave rise to the reptiles and for nearly 150 million years these were the principal forms of life on land, in the sea, and in the air.

[C] Many of the later mammals, though now extinct, were known to primitive man and were featured by him in cave paintings and on bone carvings.

[D] Nearly all of the fossils that we know were preserved in rocks formed by water action, and most of these are of animals that lived in or near water.

[E] The earliest animals whose remains have been found were all very simple kinds and lived in the sea.

[F] Many factors can influence how fossils are preserved in rocks. Remains of an organism may be replaced by minerals, dissolved by an acidic solution to leave only their impression, or simply reduced to a more stable form.

[G] From them we can tell their size and shape, how they walked, the kind of food they ate. Very occasionally the rocks show impression of skin, so that, apart from color, we can build up a reasonably accurate picture of an animal that died millions of years ago.

42（）

核电厂烟羽警戒区域以反应堆为中心其半径是（）。

A、3～5Km

B、4～6Km

C、5～7Km

D、7～10Km