【单选题】关于氢键及范德华力,下列说法正确的是
C.
沸点 HI > HBr > HCl > HF
D.
H 2 O 是一种稳定的化合物,这是由于 H 2 O 之间形成氢键所致
【单选题】在家庭的内部结构中,促使家庭成员达成共识的重要条件是
【单选题】关于范德华力,下列说法正确的是 ( )
A.
分子质量越大,范德华力越大;分子的极性越大,范德华力越大
B.
分子质量越大,范德华力越大;分子的极性越大,范德华力越小
C.
分子质量越大,范德华力越小;分子的极性越大,范德华力越小
D.
分子质量越大,范德华力越小;分子的极性越大,范德华力越大
【单选题】企业发生涉及货币收付以外的业务需要编制的记账凭证是()
【简答题】Armida Scarpa is an English teacher. She believes that stories can be used from the very beginning. She uses a real text of Goldilocks with her class. 1 . They are in their second year at school. They...
【单选题】He was thirsty, so he poured some water _____ his glass. [ ]
【单选题】She listened attentively while he poured out all his ____ for the future.