【简答题】Tim’s (puzzle) expression suggested that he didn’t understand what they had said.
【判断题】In this high-tech era, it is not a difficult task to collect enough information and to use information effectively.
【单选题】He didn’t understand the way_____ I worked out the problem.
【单选题】关于麻醉前用药的种类、用量、给药途径和时间的描述,下述哪项是错误的
B.
麻醉前用药一般在麻醉前30~60分钟肌内注射