问题
填空题
实验室配制500mL 0.2mol/L Na2SO4溶液,所需仪器有 ;若实验操作中某同学在加蒸馏水至刻度线时仰视观察确定蒸馏水的加入量,则所配溶液浓度 (选填“偏高”“偏低”或“无影响”)。
答案
天平(托盘天平)、烧杯、玻璃棒、500mL容量瓶、胶头滴管;偏低
实验室配制500mL 0.2mol/L Na2SO4溶液,所需仪器有 ;若实验操作中某同学在加蒸馏水至刻度线时仰视观察确定蒸馏水的加入量,则所配溶液浓度 (选填“偏高”“偏低”或“无影响”)。
天平(托盘天平)、烧杯、玻璃棒、500mL容量瓶、胶头滴管;偏低
选词填空 | |
—She’s thirty-three. 2. Mother’s Day is the second Sunday of ________. 3. Eighteen boys are in the classroom. You are the ________ one. 4. —What’s your _______? —It’s July 22nd. 5. We go to ________ party this Sunday. 6. Let’s go to the soccer ________ on May 15th. 7. Many ________ people have English names. 8. __________ 12th is Tree Planting Day(植树节). 9. Lisa is _________ and her brother is ten years old. 10. My sister doesn’t like sports, but she likes ________. |