A:价值不变的特殊商品
B:想象的货币
C:现关的货币
D:一种价值符合
选出合适的应答语。
A. You should go to bed early.
B. You should wear a sweater.
C. She should tell the teacher and go to see the doctor.
D. You should tell your mother.
E. You should take it to see the vet.
F. You should help her do some chores.
“火立熄”是一种新型的家用灭火用品.“火立熄”接触到火焰3~5秒后炸开,释放的粉末覆盖在可燃物上,同时放出不可燃气体,使火焰熄灭.其灭火原理是( )
Many people are playing games on the beach. Some are playing volleyball, _______ are playing soccer.
读最佳人口规模示意图,回答下列问题。