婴幼儿安全防火基本要求()。
A、不得玩火
B、不得用火柴
C、不得点火
D、不得燃放鞭炮
参考答案:A
The small village is said ()in a battle during World War 11.
A. to have been destroyed
B. to be destroyed
C. to destroyed
D. to have destroyed
一段转化炉与二段转化炉内发生的主要反应特点()
A.吸热
B.体积增大
C.放热
D.体积缩小