单侧眼球下陷见于()
A.严重脱水
B.脑血管疾病
C.Horner氏征
D.甲亢
E.颅内病变
参考答案:C
我国现行的《声环境质量标准》(GB 3096—2008)中不同类别噪声标准昼间标准级差为( )dB。
A.3
B.5
C.10
D.不等
You have spoken very good English , _____ you're the beginner of learning. [ ]
A. after all
B. for example
C. to speak the truth
D. for instance