皮皮学，免费搜题
登录
搜题
【单选题】
反合相色谱中,将十八烷基键合在硅胶表面所得的ODS柱,主要用于分离A.
极性化合物
B.
极性非极性化合物均可
C.
非极性和中等极性化合物
D.
只能分离非极性化合物
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】II. VOCABULARY similarities Complete the text with these words. 【as】【both】【identical】【like】【neither】【similar】【so】 People think my best friend Jessica and I are sisters, because were very similar . Jes...
【判断题】Tops are clothes we wear on the upper bodies, such as shirts, jackets, sweaters or jeans.
A.
正确
B.
错误
【简答题】And i promise that v______ all of them will provide you with
valuable lessons which will erich your life.
【简答题】Complete the sentences with words from the box. People think my best friend Jessica and I are sisters, because were very . Jessica from the same city me, and we look very each other. We like shopping,...
【简答题】People think my best friend Jessica and I are sisters, because were very similar. Jessica from the same city _____me, and we look very______each other. We ______ like shopping, and we have the sa...
【单选题】对于重金属的吸收效率,下列排列由高到低正确的是()。
A.
蔬菜>小麦>玉米>水果
B.
蔬菜>小麦>水果>玉米
C.
蔬菜>小玉米>小麦>水果
D.
小麦>蔬菜>玉米>水果
【单选题】对建设项目投资项(或者成本项)信息进行编码时，适宜的做法是( )
A.
综合考虑投资方、承包商要求进行编码
B.
综合考虑概算、预算、标底、合同价、工程支付等因素建立编码
C.
根据概算定额确定的分布分项工程进行编码
D.
根据预算定额确定的分布分项工程进行编码
相关题目：