1982年,美国科学家将人的生长激素基因转移到了小鼠体内,得到了超级小鼠,此转基因技术的受体细胞是()
A.受精卵细胞
B.去核卵细胞
C.卵细胞
D.乳腺上皮细胞
参考答案:A
—I can start to work next Monday.
—____________ then. I am glad to be able to offer you the job.
A.You can't be serious.
B.You're welcome.
C.That's right.
D.It's settled.
斜疝与直疝最重要的鉴别标准是()
A.疝块是否降入阴囊
B.患者年龄
C.疝块的外形
D.疝囊颈与腹壁下动脉的关系
E.疝块能否回纳