2022英语周报九年级37期答案

【语法填空】36. a 37. scenic 38. In 39. which 40. extremely 41 is situated 42 had been repaired 43 constructionscoveng 45

5.B【解析】设AC与BD相交于O.由于BD⊥OC,BD⊥OA1,所以BD⊥平面A1OC,在△A1OC中,OC=OA1=√2,A1C=√6,运用余弦定理可得,∠COA2x,v=1×s×BD=1×1×y√6√2×222=3·故选B.

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