病历摘要：患者女性，25岁，原有风湿性心脏病二尖瓣狭窄并关闭不全。因发热，胸闷气促2周入院，伴左上腹痛。查体：T38℃，眼结膜有出血点，心率100次/分，心尖部可闻及3/6级隆隆样舒张期杂音，3/6级收缩期吹风样杂音，呈乐性。
抽血培养，以下哪些是正确的（）
A.在用抗生素之前采血
B.任何时间采血都可
C.每次采血10～20ml
D.入院第1天每间隔1小时采血1次，共3次
E.如次日未见细菌生长，可重复采血3次后用抗生素
F.用过抗生素者，需停药2～7天后采血
参考答案：A, B, C, D, E, F
| 阅读理解。 Mr. Green is a famous writer now. But he said he was not a good student when he was young. He was often late for school and didn't like doing his homework. Sometimes he slept in class while the teacher was teaching. He didn't understand much, but he always thought he understood everything. One day the teacher asked the students a question, "When John was ten years old, his brother was twenty. John is fifteen now and how old is his brother?" Mr. Green answered, "That's easy. His brother is twice as old as John, so he is now thirty." Another time, the teacher in a science class asked, "When it thunders, why do we always see the light before we hear the sound? But, Miss White," said Mr. Green quickly, "can't you see our eyes are in front of our ears?" The third time, the teacher in a biology class asked, "Why can fish swim in the water? But, Miss White," said Mr. Green quickly, "don't you know fish can't walk on land?" 1. Mr. Green was _____ when he was young. A. strong B. lazy C. clever 2. Mr. Green _____ when he was a student. A. understood much B. didn't like to do his homework C. did a lot of housework D. learned science and biology very well 3. How old is John's brother when John is fifteen in the teacher's question? A. Ten years old. B. Fifteen years old. C. Twenty years old. D. Twenty-five years old. 4. According to (根据) Mr. Green, when it thunders, we always see the light before we hear the sound because _____. A. our eyes are in front of our ears B. our eyes are cleverer than our ears C. our eyes can see but our ears can't D. light goes faster than sound 5. Why can fish swim in the water? Mr. Green's answer was _____. A. fish can't walk on land B. fish can't swim on land C. fish can't walk in the water D. fish has no legs or hands |