____长时间对电磁铁通电。（填“要和不要”）
“贞观之治”为唐朝的强盛奠定了坚实的基础。下面有关“贞观之治”出现的原因的叙述,不正确的是（ ）
—___these her erasers?
—No, they ___.
读拼音写词语
huǐ hèn
bǎo jīng fēng shuāng
cí xiáng
____
—______are Jim and Lily going hiking with their class?
—The day after tomorrow.
