【简答题】There are no accurate figure on the number killed by 14 Idie in center and southeastern Africa. But Mozambique's president is saying it could be as high as a thousand. United Nations and international...
【单选题】()my knowledge the figure at the loading port is not quite accurate.
【判断题】(2R,3S)-酒石酸因为有两个手性碳,所以它也有旋光活性。