【单选题】临床上药物的治疗指数是指 A. ED 50 /LD 50 B. LD 50 /ED 50 C. LD 5 /ED 95 D. ED 95 /LD 5 E. LD 1 /ED 95
【单选题】临床上药物的治疗指数是指 A. ED 50 /LD 50 B. LD 50 /ED 50 C. LD 5 /ED 95 D. ED 95 /LD 5 E. LD 1 /ED 95
下列记录格式正确的是（）。 A: 28°6′6″ B: 28°6′06″ C: 28°06′06″ D: 028°06′06″
下列记录格式正确的是（）。 A: 28°6′6″ B: 28°6′06″ C: 28°06′06″ D: 028°06′06″
In 1803 the United States purchased Louisiana from _____.
In 1803 the United States purchased Louisiana from _____.
ask(ed) A: want(ed) B: pleas(ed) C: carri(ed) D: help(ed)
ask(ed) A: want(ed) B: pleas(ed) C: carri(ed) D: help(ed)
下列记录格式正确的是：: 28°06′06″/#/28°06′6″/#/28°6′06″/#/28°6′6″
下列记录格式正确的是：: 28°06′06″/#/28°06′6″/#/28°6′06″/#/28°6′6″
Section BListen to the short dialogues and choose the best answer to each question.8. A: 06:30 B: 06:20 C: 06:40 D: 06:10
Section BListen to the short dialogues and choose the best answer to each question.8. A: 06:30 B: 06:20 C: 06:40 D: 06:10
可靠安全系数是指（） A: LD/ED B: ED/LD C: LD/ED D: LD/ED E: ED/LD
可靠安全系数是指（） A: LD/ED B: ED/LD C: LD/ED D: LD/ED E: ED/LD
某直线坐标方位角为45°21’06"，则该直线反坐标方位角为（）。 A: 135°21’06" B: 315°21’06" C: -45°21’06" D: 225°21’06"
某直线坐标方位角为45°21’06"，则该直线反坐标方位角为（）。 A: 135°21’06" B: 315°21’06" C: -45°21’06" D: 225°21’06"
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In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.
In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.