女,23岁,患右上肺结核并空洞,曾用过INH0.3g/天,RFP0.4g/天,EMB0.75g/天,治疗3个月后症状消失,即停药。1年后出现低热,复查胸片病情恶化。本例治疗失败的主要原因()
A. 化疗方案不合理
B. 机体免疫力太差
C. 未规律用药
D. 停药过早
E. 细菌耐药
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平面体系大跨度空间结构包括()。
A. 单层刚架、拱式结构、简支梁结构、屋架
B. 拱式结构、屋架、刚式结构
C. 刚式结构、简支梁结构、屋架
D. 单层刚架、刚式结构、简支梁结构、屋架
关于拱式结构,说法错误的是()。
A. 拱是一种较早为人类开发的结构体系,广泛应用于房屋建筑与桥梁工程中
B. 拱式结构的侧向刚度好
C. 拱是一种有推力的结构,它的主要内力是轴向压力
D. 这种结构特别适用于体育馆、展览馆、散装仓库等建筑
图2-4中不存在(41)。
A. 欧拉回路
B. 欧拉路径
C. 欧密尔顿回路
D. 哈密尔顿路径
It was a market day, so people and traffic had been pouring into the town since early morning. 【B1】 it was an old town, even the main street was very 【B2】 and soon became overcrowded. There was not enough 【B3】 for all the people on the sidewalk at the roadside, 【B4】 they overflowed into the road, 【B5】 danger to their lives from 【B6】 cars and buses, the drivers of 【B7】 were constantly blowing their horns (喇叭) to 【B8】 people to get out of their 【B9】 .
Yet it was a(n) 【B10】 scene. Peasants walked along the street, their heads piled high with baskets or beautifully woven blankets which they hoped to 【B11】 to the townsfolk. Men with carts 【B12】 their way along, shouting their goods at the top of their 【B13】 . They were selling apples, oranges and grapes--the 【B14】 of their fields. 【B15】 it all, women in bright summer clothes made their way, laughing and talking, 【B16】 children rushed in and out of the crowds screaming with laughter when they didn't ask for something they could not have, or crying out of 【B17】 because they were lost.
The noise went on all day. People did not even stop for a meal, but preferred to buy bits of meat cooked over a fire or bread or ice-cream from the street sellers. The 【B18】 from this and from all the activities of the day began to collect in the street. And finally, when night at last came, the street 【B19】 and only the rubbish 【B20】 , sadly blowing in the cooling night wind.
【B1】
Although
B. For
C. But
D. As