someone who studies or teaches linguistics.: ()
A. lingual
B. linguist
C. lingu
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inflammation of the skin: ()
A. dermatitis
B. dermatology
C. dermatic
an instrument for examining the interior of the eye : ()
A. ophthalmoplegia
B. ophthalmoscopy
C. ophthalmoscope
an inflammation of the urinary bladder: ()
A. cystinosis
B. cystitis
C. cystinuria
杆件AB段发生什么变形。
A. 剪切和挤压
B. 扭转
C. 弯曲
D. 拉伸