‌_______是因纽特人音乐中最常见的乐器。‎

单项选择题Which of the following is NOT true about refrigerated food cargoes? A、Refrigerated food cargoes include fresh food and frozen meat. B、Refrigerated food cargoes include vegetables and dairy products. C、Refrigerated food cargoes are stored in containers. D、Refrigerated food cargoes are stored in reefer containers.

单项选择题下列不可用于克隆子筛选的载体选择基因有（）A. 抗生素抗性基因B. 萤火虫荧光素酶基因C. 绿色荧光素酶基因D. 限制性酶切位点