实验室有一瓶标签残缺的试剂可能是浓盐酸,有同学提出打开瓶塞观察。这属于科学探究中的
--I can’t solve the math problem because it is too difficult. What should I do? -- _________ ask the teacher for help?
— ? —I like action movies.
—— do you of the sports shows? ——They’re interesting.
What colour sweater do you like ,green ______ blue?
— does Jim to school? —By bus.