重要情感
参考答案：重要情感：是指对一个人来说很重要的情感，主要指对爱人、对子女及对其他有亲密关系的人的情感。
It was because of his illness _____ the meeting had to be put off.
A．which
B．what
C．that
D．so that
何为热应力指数（Heat Stress Index）、风冷却指数（Wind Chill Index）。
