下列物质中,属于纯净物的是( )                     

 下列物质中,属于纯净物的是(  )

                          

A.加碘盐      B.调和植物油        C.洗涤剂     D.干冰(固体二氧化碳)

答案

D

相关题目

6. — Would you like to go to the cinema with me this evening?  — I’d lik
6. — Would you like to go to the cinema with me this evening?  — I’d like to, but I won’t be free tonight. Let’s make ____ some other day.  A. it        B. them       C. you
已知点P是边长为4的正方形内任一点,则P到四个顶点的距离
已知点P是边长为4的正方形内任一点,则P到四个顶点的距离均大于2的概率是(   )  A.      B.     C.        D.
With his son ____, the old man felt unhappy.     A. disappointed   B. to be
With his son ____, the old man felt unhappy.     A. disappointed   B. to be disappointed  C. disappointing  D. being disappointed
可逆反应:3A3B+C,△H>0 ,已知反应物A为气态物质,随着
可逆反应:3A3B+C,△H>0 ,已知反应物A为气态物质,随着温度升高,反应体系中气体的平均相对分子质量有变小趋势,则下列判断中,正确的是    
 The driver braked hard to avoid ________a child coming in his way. A.hit 
 The driver braked hard to avoid ________a child coming in his way. A.hit   B.to hit C.hitting   D.to have hit
下列说法正确的是(   ) A. 配制FeCl3溶液,可将一定量FeCl3
下列说法正确的是(   ) A. 配制FeCl3溶液,可将一定量FeCl3固体溶于适量盐酸中并加入少量铁粉 B. 制备Fe(OH)3胶体,可向沸水中滴加FeCl3饱和溶液并长时
猴子、噬菌体、烟草花叶病毒中参与构成核酸的碱基种类数
猴子、噬菌体、烟草花叶病毒中参与构成核酸的碱基种类数,依次分别是(    )     A.4、4、5  B.5、4、4  C.4、5、4  D.5、4、5
 He doesn’t want red flowers. He want _______.       A. purple ones  
 He doesn’t want red flowers. He want _______.       A. purple ones    B. purple one    C. the purple    D. purple

最新题目