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1、天舟高考衡中同卷调研卷2023答案
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河流袭夺是指分水岭一侧的河流夺取了另一侧河流上游段的现象。汉江上游在地质历史时期发生过两次河流袭夺。第一次古汉江切穿西侧的分水岭,使汉中盆地的水系注入古汉江;第二次南支流溯源切穿凤凰山袭夺汉江上游,成为了目前的汉江主河道。南支流普遍存在V形峡谷嵌套在宽浅河谷中的现象。下图示意汉江上游发生河流袭夺的水系。据此完成14~16题。
varied, but one 2014 analysis showed that of 14 countries that allow research on embryonic stemcells, 13 ban germline modification (修改) . An expanded survey showed that of 39 countries, 29ban germline modification and those that do not are ambiguous on the topic. In some cases, countrieshave stated that they will reconsider if genome editing is deemed safe.28.Which of the following can replace the underlined word“assorted”in the first paragraph?A.Various. B.Clear. C.Positive. D.Critical.