⑴Amy ____ A. climbed the Tianshan Mountains yesterday.
⑵Sam ____ B. went to Xinjiang last year.
⑶Lingling ____ C. visited the Tianchi Lake last week.
⑷Daming ____ D. rode a horse last year.
⑸Tom ____ E. went to Beijing last summer holiday.
2016年6月，国内市场小麦价格出现不同程度下跌。对小麦价格下跌的原因分析，最合理的是（ ）
区别下列各组物质，括号内所选用的试剂或实验用品错误的是（ ）
