Was it last Friday ________ you met him？ A. that B. on whichC. which D. when
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被誉为"两弹元勋"的科学家是（） A.钱学森 B.竺可桢C.邓稼先 D.袁隆平
_______ by the air， the kite went up into the sky. A. PushingB. Pushed C. Having been pushed D. Having pushed
_________A. carried B. graspedC. took D. threw
美国1878年宪法最突出的局限性是（） A.总统的权力过大 B.大小州之间不平等 C.国会中没有人民选举的代表 D.严重的种族歧视
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