Hello，boys and girls! Nice to1 you! My name2 Alice Smith．I am a 3．I am a 13．Look, 4 this? It's a photo 5 my family．These are my parents and this is my6，Linda．She is 9．My mother is a teacher in a 7．My father is a teacher ,too．My pen is red．and Linda’s ruler is 8。too．Our 9 number is 826-9167．You can 10 us at it．I love my family．

体表有外骨骼的是（　　）

称取铜、锌混合物粉末10.0 g置于烧杯中，慢慢加入稀硫酸使其充分反应，直至固体质量不再减少为止，此时用去49.0 g稀硫酸。剩余固体3.5 g。