EIA RS-232C是一种广泛使用的串行物理接口标准，其电气特性规定逻辑“1”电平为_____伏。
参考答案：
We should ____, because he is still a child.[ ]
A. pardon him to be rude
B. excuse him for being rude
C. excuse to be rude
D. excuse him to being rude
烧结空心砖每10万块为一验收批，小砌块每1万块为一验收批，不足上述数量时按一批计，抽检数量为一组。
