与Ts细胞有关的是()
A.具有辅助增强其他免疫细胞的功能
B.具有抑制其他免疫细胞的功能
C.自然杀伤细胞
D.释放淋巴因子,引起Ⅰ型超敏反应
E.分泌抗体
参考答案:D
In March 2013, Xi Jinping, ____ leader of the Chinese Communist Party, was warmly received by Putin, who was elected ____ president of Russia two years ago.
A./; /
B.the; /
C.the; the
D./; the
建立危机预警机制必须坚持的原则不包括()。
A.以人为本原则
B.长抓不懈原则
C.分级预警原则
D.信息来源单一化