A：he was able to make himself hear
B：was he able to make himself hear
C：was he able to make himself heard
D：he was able to make himself heard
下列对选文的分析理解有错的一项是（ ）
（Ⅰ）求实数a的值：
（Ⅱ）若不等式f（3x）+f（x+3）≥m对一切实数x恒成立，求实数m的取值范围．
