Listen to the two sentences and fill in the blanks with the missing words.[音频]Sentence 1: Hey, Ricardo. 1 2 3 4 .Sentence 2: Oh, Mr. Otani, I'd 5 6 7 8 Andres Carcia.
Please answer the question in less than 50 words:What elements help GEICO to be the number-two company in its ultra-competitive industry?
显微注射法是通过显微镜把外源基因注射到()
A. 成熟的精子
B. 成熟的卵子
C. 雄原核
D. 合子
克隆羊多利是体细胞克隆的方式培育的,是属于()繁殖。
A. 无性
B. 有性
C. 融合
D. 孤雌