试题详情

At?the?beginning?of?class,?the?noise?of?desks?_________?could?be?heard?outside?the?classroom.

（ ）The noise of desks_______could be heard out in the street.

s to help students to pay attention to teaching contents efficiently at the beginning of the class.

The publication of“_____” marked the beginning of Romantic Age.

Which of the following could be the length of a filament?