例句 1：This region is known for its rare plants that only grow in cold climates.（ ）
例句 2：The factory has built a new plant to produce electric vehicles.（ ）
例句 1：The research project will be expanded on a larger scale next year.（ ）
例句 2：The thermometer has a scale from -20℃ to 50℃.（ ）
例句 1：The main subject of the meeting is the improvement of product quality.（ ）
例句 2：Mathematics is a compulsory subject for all high school students.（ ）
例句 1：Doctors are trying to find a new way to treat this rare disease.（ ）
例句 2：She decided to treat her friends to dinner to celebrate her promotion.（ ）
例句 1：The farm’s wheat yield has increased by 20% due to new technology.（ ）
例句 2：The experiment yielded important results that could help cure cancer.（ ）