据调查发现,少数私营企业“唯利是图”,“要钱不要命”,导致非公有制企业成为安全生产的主要杀手。对此,下列说法正确的是
The cancer risks ___________ smoking have been well documented.
They are purely __________ weapons, not designed for attacks.
It's not by any means a brilliant salary but it's ________for our needs.
There are strict limits on ____________ the country because a lot of social problem could arises and the country can’t take in a lot of new blind comers. .
The concert has been canceled __________ lack of support.