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问题 多项选择题

患者男性，26岁，因车祸致腹部、腰背部创伤，半小时入院。体检：体温36.2℃，脉搏120次／分，呼吸28次／分，血压37.5／22.5mmHg，面色苍白，皮肤湿冷，躁动，腹部膨隆有压痛，肌紧张，移动性浊音阳性，肠鸣音减弱，腹腔穿刺抽出不凝血，骨盆挤压试验阳性，直肠指诊触及骶前区隆起有波动感，X线检查示粉碎性骨盆骨折、腰2椎体骨折。入院后诊断为腹膜后血肿。提示：为预防腹腔感染，术前及术后均用氨苄青霉素加庆大霉素静脉滴注。氨苄青霉素与庆大霉素各属哪一类抗菌素？（）

A.快效抑菌剂与慢效杀菌剂

B.青霉素类与氨基糖甙类

C.青霉素类与大环内酯类

D.繁殖期杀菌剂与静止期杀菌剂

E.快效杀菌剂与快速抑菌剂

答案

参考答案：B, D

单项选择题

Not everyone in the world requires the same amount of living space. The amount of space a person needs around him is a cultural difference, not an economic one. Knowing your own psychological space needs is important because they ply affect your choices, including, for example, the number of bedrooms in the home. If you were brought up in a two child family and both you and your sister or brother had your own bedrooms, the chances are if you have two children or more, that you also will offer separate bedrooms for them. In America, for example, they train people to want to have their own rooms by giving them their own rooms when they are babies. This is very unusual in the world. In many other countries, the baby sleeps in the same bed with his parents or in bed near them.
The space in the home also shows a lot about psychological space needs. Some families gather closer to each other and the size of their house has nothing to do with it. Others have separate little corners where family members go to be alone.
Although it is true that psychological space needs are not decided by economic reasons, they sometimes have to be changed a little because of economic pressure. It is almost impossible, however, to completely change your psychological space needs.

The first sentence in Paragraph 1 "Not everyone in the world requires the same amount of living space" means ______.

A．Not two people need exactly the same amount of living space
B．Living space requirements are not always the same
C．The world requires the same amount of living space
D．Nobody needs a required amount of living space
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填空题

氢原子从能级A跃迁到能级B时，辐射出波长为λ1的光；从能级A跃迁到能级C时，辐射出波长为λ2的光。若λ1>λ2，则氢原子从能级B跃迁到能级C时，将_______（填“吸收”或“辐射”）光子，光子的波长为________。
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