题干
At the beginning of the 20th century
, many people thought that the family was falling apart--- _______, they thought it was dying.
A：on the other hand
B：for another
C：in other word
D：in additio
答案(点此获取答案解析）
C
H＝-571.6 kJ·mol-1，下列有关叙述不正确的 （ ）