南北半球分界线是( )
A.10°N
B.0°
C.10°S
D.20°S
南北半球以0°纬线即赤道为界;20°W和160°E经线组成的经线圈是东西半球的分界线.
故选:B.
Teachers have to constantly update their knowledge in order to maintain their professional ________.[ ]
A.consequence
B.independence
C.competence
D.intelligence
肾上腺素用于过敏性休克,支气管哮喘。()