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رد: ملاحظة مهمة في مادة مدخل الى اللغويات
19.Our ancestors made a very significant transition to an upright posture, with bipedal locomotion. Bi-pedal means:
A. on two limbs.
B. on two feet.
C. on four feet.
D. on two feet and two limbs
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هذا وشو .. 
متى اخذناه .. 
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