【单选题】听力原文:What time will the bank open? (A) It opens at 8 A.M. (B) The door is open. (C) The bank has a large clock. (11)
【单选题】下列物质的变化过程中,属于放热反应的是 ( )
【单选题】根据下列信息判断氢气燃烧生成水时的热量变化,其中一定正确的是( )
A.
H 2 O分解为H 2 与O 2 时放出热量
B.
生成1mol H 2 O时吸收热量245kJ
C.
甲、乙、丙中物质所具有的总能量大小关系为乙>甲>丙
【单选题】—_____ the door, please. —Come in. The door _____ . [ ]
【简答题】A.Please open the door. B.Don't open the door. C.She is not sure whether to open the door. D.She doesn't agree.
【单选题】---- _______the door, please. ----Come in please. The door _______.
【单选题】单位质量的燃料在完全燃烧时所放出的热量称为燃料的()。
【简答题】rubber [ ˈrʌbə ] n. 橡胶;橡皮 [ pl.] 胶鞋 a. 橡胶的