呋塞米
A．麻黄碱
B．氨茶碱
C．色甘酸钠
D．克仑特罗
E．丙酸倍氯米松
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免疫放射分析的标记物是使用（）.
A.核素标记抗原
B.核素标记抗体
C.限量
D.等量
E.过量
无级调速机车主手柄提升位，5、6、7、8号触头（），柴油机转速上升。
已知：Na2O+H2O=2NaOH，向饱和的氢氧化钠溶液中加入一定量的Na2O，充分反应后恢复到原来温度．下列说法中，正确的是[ ]
A、溶液中溶质质量增多，溶液的质量减少
B、溶液中溶质质量增多，溶液的质量增加
C、溶液中水的质量减少，溶质质量分数不变
D、溶液中水的质量减少，溶质质量分数增大
烧伤后48小时之内正确的体位摆放是（）
A.床头抬高30°
B.床头抬高50°
C.保持在功能位
D.平卧
E.侧卧
| Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation. About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag. |
The underlined word "rainbow" in the sixth paragraph refers to______.
A．the rainbow in the sky
B．the stripes on the pavement
C．something imaginative and fun
D．important lessons learned in childhood