取少量下列物质分别放入水中，充分搅拌后，不能形成溶液的是（ ）
A．氢氧化钠
B．硝酸铵
C．植物油
D．蔗糖
A、氢氧化钠易溶于水，能形成均一稳定的混合物，属于溶液，故A错；
B、硝酸铵易溶于水，能形成均一稳定的混合物，属于溶液，故B错；
C、植物油不溶于水，与水结合形成的混合物不均一、不稳定属于乳浊液，不属于溶液，故C正确；
D、蔗糖易溶于水，能形成均一稳定的混合物，属于溶液，故D错．
故选C．
I can still remember when I met my best friend．She had just moved into the neighborhood and her grandmother brought her down to 1 me．I hid behind my mother she hid behind her grandmother， 2 to look at each other．Soon we lost the 3 and started playing with each other． In the 7th grade，I first intentionally distanced myself from her．At that time, she was 4 family problems and I deserted her to be with me because she got _ 5 than ever before．None of my new friends liked her as much as I did because they knew she had_ 6 ．However，every summer we couldalways sit at each other’s house and watch soap operas，and talk about all the boys we liked． It was last year when I noticed the problem．I guess I was too devoted in high school to 7 she needed someone there for her．Anyway，she made a new best friend and so did I．Then I didn’t know why，but she started cutting herself! She then was diagnosed（诊断）with clinical depression．At first，I was very 8 ，but we still stayed in __9___．I wanted to be there for her since her new best friend basically 10 __ her and people were calling her 11 ． Yesterday she came to me and said：“I never knew what a best friend was until you were the only person that would stop me cutting．I 12 you so much，and you didn’t even know you were ___13 me．” We both cried．And a kind of 14 that I learn from my life so far is never to give up on your friends．Even if they aren’t as warm as others，or people think they are crazy，they need someonethere．If you desert them，you will only be 15 yourself.
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