主要由肝细胞合成的血清蛋白是()
A.白蛋白
B.β球蛋白
C.α1球蛋白
D.α2球蛋白
E.γ球蛋白
参考答案:A, B, C, D
想一想,用“take,by”填空。
1. May I __________ your picture?
2. I want to __________ an airplane to the U. K.
3. I go to the U. K. __________ airplane.
4. Let's __________ a train to Beijing.
5. I want to go to Beijing __________ train.
6. I go to the park __________ bus. Let's __________ a bus there.
某一健康的人一次失血为多少才能引发生命危险[ ]
A.1200~1500mL
B.800~1000mL
C.600~700mL
D.400~500mL