传动方式有三种:热传导、热对流和()。
参考答案:热辐射
我国国有企业下岗职工基本生活保障体系建设的主要内容是( )。
A.为下岗职工办理商业保险
B.为下岗职工提供社会救济
C.建立和完善三条保障线
D.确保企业离退休人员的养老金发放
34.Whether age is happy or unpleasant depends less on money or on health than______ on your ability to have fun.
A.it is
B.it does
C.it did
D.it was