With the popularity of the Internet, more and more people prefer to going shopping online because its advantages. Online shopping can cost us a lot of valuable time. What’s more , there are a wide variety of goods for us to choose from , which may be cheaper than that in shops. Though it is convenience to go shopping online, the problems it caused can’t be ignored. Since we can’t see the actual goods on the Internet, the quality cannot be ensured. Beside, lots of advertisement on the Internet are untrustworthy, so sometimes the customers are easily cheated.

In my opinion, we should be carefully while we are enjoyed the convenience of online shopping.

下图是配制溶质质量分数为10%的NaCl溶液的实验操作示意图：

（1）用上图表示的序号表示配制溶液的正确操作顺序_____________。

（2）图②中，有一种塑料仪器，其名称是_________。

（3）称量NaCl时，天平平衡后的状态如图⑤所示，游码标尺示数见下图，则称取的NaCl质量为_____。

（4）根据计算需要量取水的体积是________（水的密度为1g/mL）。量取读数时，下图视线角度正确的是_____。（选填字母标号）

（5）称量NaCl质量完毕放回砝码时，发现有一个砝码缺损了一个小角，若其他操作步骤正确，则所配溶液的溶质质量分数________（填“大于”、“小于”或“等于”）10%。