禁止露天高空作业的情况为()。

A. Coins with a higher content of silver drove the coins with a lower content of silver out of circulation.
B. Good money was kept and "bad money" was used in exchange.
C. Bad money should be melted down.
D. Good money has a higher face value.

A. 原发性B细胞缺陷
B. 重症联合免疫缺陷
C. 原发性补体缺陷
D. 遗传性血管神经性水肿
E. 多发性骨髓瘤

A. 滤泡性腺癌
B. 乳头状腺癌
C. 鳞癌
D. 髓样癌
E. 腺癌