据推测原始大气中不可能存在的气体是( )
A.氧气
B.甲烷
C.氨气
D.氢气
答案:A
题目分析:原始大气的主要成分是氨、氢、甲烷、水蒸气.水是原始大气的主要成分,当时大气中没有氧气.
Before undergoing a subtotal thyroidectomy, a client receives potassium iodide (Lugol’s solution) and propylthiouracil (PTU). The nurse would expect the client’s symptoms to subside()
A. in a few days.
B. in 3 to 4 months.
C. immediately.
D. in 1 to 2 weeks.
精癃的临床特征是哪些()
A. * * 口常有精液溢出
B.排尿困难、尿潴留
C.阴囊肿大偏坠,但无红热,透光试验(+)
D.阴茎背侧触及硬结或索状斑块
E.射精时精液呈淡红色或棕色