问题 单项选择题

眼化学伤预后不良的指征有()

A.角膜上皮完全缺损

B.角膜上皮反复缺损

C.出现前房积脓

D.1/2以上角膜缘缺血

E.眼压升高

答案

参考答案:D

解析:化学伤累及角膜缘时造成角膜缘干细胞衰竭,影响角膜上皮细胞的表型和功能。1/2以上角膜缘缺血为眼化学伤Hughes临床分级Ⅳ级,提示伤眼预后不良,故本题答案是D。

阅读理解

C

I was riding along the road when I heard someone shouting behind me. It was a young shepherd (牧羊人). He was running across a field, and pointing at something.

I looked and saw two wolves running across the field. One was fully grown, the other was a cub. The cub had on his back a lamb (羔羊) which had just been killed, and he had the leg in his mouth. The old wolf was running behind.

As soon as I saw the wolves, I joined the shepherd and started in pursuit (追击), setting up a shout.

When they heard, some peasants started out also in pursuit, with their dogs.

As soon as the old wolf caught sight of the dogs and the men, he ran to the young one, snatched (攫取) the lamb from him, threw it over his back, and both wolves increased their pace and were soon lost from view.

Then the shepherd began to tell me how it happened. The big wolf has sprung (跳跃) out from the valley, seized the lamb, killed it and carried it off. The old wolf allowed the young wolf to carry the lamb, but kept running a short distance behind.

But as soon as there was danger, the old wolf stopped giving the lesson, and seized the lamb himself.

58. What is a cub?

A. It’s an old wolf.     B. It’s a young wolf.    C. It’s a strong wolf.    D. It’s a big wolf.

59. The old wolf seized the lamb for himself because __________.

A. the cub would not carry it any longer         B. the cub was too tired   

C. there was danger                         D. the cub would not learn

60. What is the passage about?

A. How a young wolf carried a lamb.

B. How the wolves escaped.

C. How some peasants tried to catch the wolf.

D. How an old wolf taught its cub..

多项选择题