the drug has had immediate effect on patient 前面的为什么是has 而后面的为什么是had?谢谢赐个教个 在下 自学英文中 此题不甚解 虽然没有分数 交流知识 感激之

The patient has ____to the drug and is recovering quickly the drug has had immediate effect on patient 前面的为什么是has 而后面的为什么是had?谢谢赐个教个 在下 自学英文中 此题不甚解 虽然没有分数 交流知识 感激之 The patient has ____to the drug and is recovering quickly.replied responded answered usedThe patient has ____to the drug and is recovering quickly.replied responded answered used when taken according to the directions,the drug has no side effects.翻译一下 Genarally speaking,when taken according to the directions ,the drug has no side effect. 英语翻译Generally speaking ,when taken according to the directions ,the drug has no side effect. 根据首字母提示填词The drug has an immediate e______________ on the patient. the drug store 中文翻译 翻译：“it is apparent from scientific studies that the drug has some fairly nasty side effects” The drug has undergone a number of clinical trials.句子翻译 patients who had been given the new drug were aspatients who had been given the new drug were asked to monitor their progress and report to the doctor down to the smallest detail.求完美翻译,其中 down 1.Only when the research has been carried out______whether the drug has a side effect on human body.A.we decide B.we will decide C.did we decide D.will we decide2.It was not until ge explained the reason _____we realized that we had misunderstood him drug when being taken according to the directions ,the drug has no side effect这句话有没有错误 these studies determine where the drug has the desired profile of action in model system跪求翻译 prescription drug nonprescription drug over the counter是什么意思啊 分析其句子成分?Until now scientists had very little clear evidence about the drug's role in preventing more serious effects of infection.“about drug's role”是不是介词短语作补语?“in preventing more serious effects of infection He ________ the computer for half a year. A.has bought B.had bought C.has had D.had had