2022-2022年七年级英语周报新目标答案

56. to evaluate 57. that 58. will be included/ is included 59. their 60. with61. Additionally 62. have responded 63. creative 64. awarding 65.an

5.B因为a=(1,m),b=(0,2),所以3a-mb=3(1,m)-m(0,2)=(3,m),又b⊥(3a-m),所以b·(3a-mb)=(0,2)·(3,m)=2m=0,解得m=0.故选B

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