有些外毒素可由革兰氏阴性细菌产生

化学成分为脂多糖

毒性作用强

可脱毒成为类毒素

具有很强的抗原性

正确

错误

所有外毒素均由革兰氏阳性细菌产生

化学性质为蛋白质

毒性作用强

可脱毒成为类毒素

具有很强的抗原性

均由革兰氏阳性细菌产生

化学性质为蛋白质

毒性作用强

可脱毒成为类毒素

D四个选项中，选出最佳选项。 James’s New Bicycle James shook his money box again. Nothing! He carefully __36__ the coins that lay on the bed. $24.52 was all that he had. The bicycle he wanted was at least $90! __37__ on earth was he going to get the __38__ of the money? He knew that his friends all had bicycles. It was __39__ to hang around with people when you were the only one without wheels. He thought about what he could do. There was no __40__ asking his parents, for he knew they had no money to __41__. There was only one way to get money, and that was to __42__ it. He would have to find a job. __43__ who would hire him and what could he do? He decided to ask Mr. Clay for advice, who usually had __44__ on most things. “Well, you can start right here,” said Mr. Clay. “My windows need cleaning and my car needs washing.” That was the __45__ of James’s odd-job(零工) business. For three months he worked every day after finishing his homework. He was amazed by the __46__ of jobs that people found for him to do. He took dogs and babies for walks, cleared out cupboards, and mended books. He lost count of the __47__ of cars he washed and windows he cleaned, but the __48__ increased and he knew that he would soon have __49__ for the bicycle he longed for. The day __50__ came when James counted his money and found $94.32. He __51__ no time and went down to the shop to pick up the bicycle he wanted. He rode __52__ home, looking forward to showing his new bicycle to his friends. It had been hard __53__ for the money, but James knew that he valued his bicycle far more __54__ he had bought it with his own money. He had __55__what he thought was impossible, and that was worth even more than the bicycle.

阿托伐他汀钙片20mg，每夜1次，口服

阿司匹林肠溶片100mg，每日1次，口服

氯化钾缓释片1g，每日2次，口服

0.9%氯化钠注射液100ml＋依达拉奉30mg，每日2次，静脉滴注

0.9%氯化钠注射液500ml＋奥扎格雷80mg，每日2次，静脉滴注

肠内营养剂（TPF.能全力1000ml，80ml/h，鼻饲