3~6个月胚胎体内最主要的造血场所()
A.卵黄囊
B.肝脏
C.骨髓
D.脾脏
E.淋巴结
参考答案:B
When a customer withdraws money from the bank, it is required to leave his signature. But how can we be sure it is_______?
A.absolute
B.alternative
C.academic
D.authentic
黄疸以哪几项为主症
A.目黄
B.爪甲黄
C.身黄
D.齿垢黄
E.小便黄