【单选题】Steven, ______very popular with most members, was asked to be the chairman of the tennis club.
【单选题】The chairman asked me to ______my speech to 20 minutes.
【简答题】A.She was asked to call the chairman's wife. B.She was asked to retake the final exam. C.She was asked to make a copy of the English final exam. D.She was asked to take the paper to the chairman's wif...
【简答题】(4分)氧化还原反应在工农业生产和日常生活中有广泛的应用。 (1)人通过呼吸作用吸入氧气,氧化体内的葡萄糖(C 6 H 12 O 6 )提供能量以维持生命活动。反应为:C 6 H 12 O 6 +6O 2 =6CO 2 +6H 2 O+能量,该反应中的还原剂是 。 (2)罐头厂在装食物罐头时,通常要添加一些对人体无害的防腐剂,防止食物被空气中的氧气氧化而变质。此类食物防腐剂应具有 (填“氧化性”或...
【简答题】罐头厂在装食物罐头时,通常要添加一些对人体无害的抗氧化剂,此类食物抗氧化剂,防止食物被空气中的氧气氧化而变质。此类食物添加剂应具有 __________( 填“氧化性”或“还原性” ) 。
【单选题】The chairman asked many questions ________ the education of the homeless children in that area.