标准状况下VL氨气溶解在1L水中，所得溶液的密度为ρ g/ml，质量分数为ω，物质浓度为c mol/L，则下列关系中正确的是（   ）

阅读下文，回答问题
                                                                                                  On the beach
    It is a fine day. A lot of people go to the beach to enjoy sunshine. Some people are swimming like fishes in the sea. On the beach，some young people are playing volleyball.
    Some of them are lying under the coconut trees. And some old people are chatting with each other. What are the children doing? Look! They are making castles with spade and sand. They are having fun。
⑴⑵⑶⑷⑸根据短文内容，判断正误；⑹根据短文内容填空。

Sun Cinema is ________ of all three.

下列实验事实不能作为相应观点的证据的是（   ）

选项	实验事实	观点
A	铁丝在氧气中燃烧后质量增大	化学反应前后质量守恒
B	水电解可得到氢气和氧气	分子是可分的
C	少量白糖加入水中，不久“消失”	微粒是不断运动的
D	5mL苯和5mL冰醋酸混合后体积大于10mL	微粒间有间隔

下列各句中，标点符号使用正确的一句是(　　)