我国现行密级配沥青混凝土马歇尔试验技术标准中控制高温稳定性的指标有稳定度和流值。( )
参考答案:对
设等比数列an中,每项均是正数,且a5a6=81,则 log3a1+log3a2+…+log3a10=( ).
Nowadays millions of people of all age take pleasure in a 1. _______
hobby which is both interested and fun. And every year 2. _______
more and more people start a stamp collection of your own 3. _______
and discover an interest which can even last lifetime. Starting 4. _______
your collection of stamps are easy became they are everywhere. 5. _______
Holiday and birthday postcards from relatives and letters 6. _______
from friends can all provide you for stamps from all over 7. _______
the world. So once you’ve started collecting seriously, you 8. _______
will probably want to join in the Stamp Collectors’ Club 9. _______
which exist to add more stamps to your collection. 10. _______