皮质醇增多症最常见的病因是()
A.原发性肾上腺皮质腺瘤
B.原发性肾上腺皮质腺癌
C.医源性皮质醇增多症
D.异位ACTH综合征
E.垂体ACTH分泌过多
参考答案:E
用custom,habit, practice和usage填空,并把句子翻译成汉语。
①It is a good _________to eat and sleep regularly.
翻译:_________________________________________________
②Social________ vary in different parts of the world.
③It's his _________to furnish references to all his quotations.
翻译:________________________________________________
④_________determines what is good English.
中性焰,氧和乙炔按体积计算的比例等于1-1.2,此时乙炔可充分燃烧。气焊一般使用中性焰,用于焊接()
A.高碳钢
B.中碳钢
C.低碳钢
D.铸钢