在光合作用过程中,氧气释放是发生在()。
A. 光反应阶段
B. 暗反应阶段
CO固定时
D. CO还原时
DR (Designated Router) is for environments where many routers on the same network such asEthernet. In the following presented network, all routers are reloaded simultaneously, and DR isselected as expected. What is the CK-RTC status?()
A. 2WAY/BDR
B. FULL/BDR
C. 2WAY/DROTHER
D. 2WAY/DR
E. FULL/DROTHER
FULL/DR
G. None of the other alternatives apply
针对HBV的特异性抗体申具有免疫保护作用的抗体是()
A. 抗HBs
B. 抗HBc
C. 抗HBe
D. 抗HBx
E. 抗PreS
代表HBV复制的血清学指标是()
A. 抗HBs
B. 抗HBe
C. HBeAg
D. HBsAg
E. 抗PreS