选择题:气相色谱中毛细管色谱柱能直接分离的样品应是 题目分类:医学检验(师) 题目类型:选择题 查看权限:VIP 题目内容: 气相色谱中毛细管色谱柱能直接分离的样品应是A、热稳定、可挥发B、热不稳定、可挥发C、对热稳定性和挥发性无要求D、热稳定、不挥发E、热不稳定、不挥发 参考答案:
He gives people the impression ___________ all his life abroad. He gives people the impression ___________ all his life abroad.A.of having spent B.to have spent C.of being spent D.to spend 分类:医学检验(师) 题型:选择题 查看答案