果蝇是研究遗传学的好材料。据图及所学知识回答下列问题： 若该细胞进行减数分裂，当处于 发布时间：2018-11-28 23:35 │ 来源：www.tikuol.com 题型：填空题 案例分析题 问题： 果蝇是研究遗传学的好材料。据图及所学知识回答下列问题： 若该细胞进行减数分裂，当处于减数第一次分裂前期时，将形成（）个四分体
题型：填空题 案例分析题 完形填空。 CONCORDE, the world's fastest passenger plane, will soon be over 33 years old. It first 1______ on 2 March 1969 in France. Concorde was developed by both France and Britain. From 1956 these two countries had a 2______ of a supersonic passenger plane. In 1962 they started to 3______ together on the project. The plane 4______ over 1.5 billion pounds to develop. It is the most tested plane in the history. It was given over 5000 hours of testing. Concorde flies at twice the speed of 5______. This means that it 6______ only 3 hours 25 minutes to fly between London and New York, compare with 7-8 hours in other passenger jets. Because of the five-hour time difference between the USA and Britain, it is 7______ to travel west on Concorde and arrive in New York before you leave London! You can catch the 10:30a.m. 8______ from London, Heathrow and start work in New York an hour 9______! Concorde is much used by business people and film stars. Each Concorde is built at a cost of 55 million pounds. Twenty have been built so far. Air France and British Airway 10______ the most. They each have seven planes. ( )1. A. invented ( )2. A. talk ( )3. A. work ( )4. A. paid ( )5. A. voice ( )6. A. spends ( )7. A. possible ( )8. A. plane ( )9. A. later ( )10.A. build B. produced B. dream B. do B. wanted B. sound B. takes B. impossibleB. passenger B. late B. make C. flew C. meeting C. carry C. needed C. noise C. covers C. real C. flight C. earlier C. sell D. took off D. fight D. finish D. cost D. shout D. travels D. unreal D. airline D. early D. own 查看答案
题型：填空题 案例分析题 AMI发作缺少心电图表现时，标志物检测推荐使用的抽样频率是（）A.入院即刻检查一次，出院前检查一次B.入院即刻，入院后2h，第二天清晨，出院时检查C.入院即刻，入院后4h，入院后8h，入院后12hD.入院即刻，入院后2h，入院后4h，出院时检查E.入院即刻，入院后每隔2h检查一次 查看答案
