英语周报高三2021-2022新课标第十六期答案

9.B本题主要考查等比数列的通项公式、等比数列的性质，考查逻辑推理及数学运算等数学学科素养，设等比数列a)的公比为g,由已知T。=8,T,-a0,两式相除，得，-袋，a7=8,g=8,g=2,义T6=8,a1·a1qa1g2·41g3…a1g·a1g5=8,25=23,解得a1=士子，又等比数列(a,}为单调递增数列，a-},a,=×20=16,故选B.

第三节One possible version:Paragraph 1Steve and Zach hadnt gone far uhen there toas afamiliar bark. Brady came bounding, stopped directly infront of Steve and hit him with his head, pushing him backtowards the slope. But Steve didnt get it. Then Bradygrabbed the boy4 Jeans and started pulling. The messagewas clear, but Steve hesitated. Of course he rememberedBrady saving his unele's life when the dog was much younger.Was he still sharp enough to get them through this?Paragraph 2Brady pulled again, in spite of the boys disbelief, iurgently. OK, big guy, "seeing the fire was touchingunderbrush nearby, Steve made up his mind.Brady ledthem back down the slope and into the trees. Several timesthe big dog stopped. Often he changed directions to find theright way. The boys were so tired but the dog bullied bothboys to go on. Steve was almost numb when he heard itthe wonderful sound of rushing water! They made it back tothe river

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