1.A【解析】图示装置中,阀a控制排气,:b控制进气,制作果酒时应关闭阀b以创造缺氧环境适时打开阀a几秒钟以排出产生的CO2,A项正确;制作果醋时,打开阀a是为了排气,打开阀b是为了通气,B项错误;酵母菌属于慊性厌氧型生物,过程②只能发生在缺氧条件下;过程①有氧和无氧都能发生,C项错误;过程①②③是酵母菌的呼吸作用,所需的最适温度基本相同(18~25℃),过程④是醋酸菌醱醋过氵程,所需的最适温度在30~35℃,D项错误。

第一节短文改错My grandpa is A wheelchairuser, always hangingaround with Jack. Jack is such a clever pet dog that heeven leams wha\to ng the doorbell. One day, when myloWhousework, the doorbell ranghouseworksmother was busy doingrepeatedche opened the door and Jack. Howeverrepeatedlysawhe didnt come in, just barking at her, as if to sayc Followingheme.” Though puzzledfollowed Jack to theFollowwheelchair. To her surprise, she found my grandpa lying onbut:ne groundIveandhis head bleeding. She managed to drhim to the hospital all at once. Thanks Jack, my grandtopa gained timely treatment

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