【简答题】As an active environmentalist, David has earned a reputation as an outspoken ______ of any kind of nuclear waste dumplin at sea.
【简答题】根据对话内容,从方框内的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 A: What’s the date today? B: It’s June 16. A: 小题1: Then it’s Dragon Boat Festival today, isn’t it? B: Yes. 小题2: A: Did you have rice dumplings this morning? B...
【单选题】—Mum, 1 am hungry. May 1 have some______? —Of course. But don't eat too much.
【单选题】时间分荧光免疫测定( TRFIA)是以镧系元素标记抗体或者抗体作为示踪物,并与时间分辨测定技术相结合,建立起来的一种新型非放射性微量分析技术。TRFIA中最常用的示踪物是
【单选题】What are the special foods for the Spring Festival?
【单选题】时间分辨荧光免疫测定(TRFIA)是以镧系元素标记抗原或抗体作为示踪物,并与时间分辨测定技术相结合,建立起来的一种新型非放射性微量分析技术。TRFIA中最常用的示踪物是