用quartus 11.0，找不到FLEX 10K系列，百度无果，最后用谷歌在altera论坛上找到了答案：
FLEX device at Quartus 11 web edition
I downloaded and installed quatrus 11.0 web edition. I need to use Flex 10K device but it doesn’t exist there. How can I import it? When should I download it?
Re: FLEX device at Quartus 11 web edition
Quartus V9.0 has been the last version to support Flex10k, see Quartus release notes