题干
. (2010·江西名校模拟) —I’ve heard they went skiing in the mountains last winter.
—It ______ true because there was so little snow there then.
—It ______ true because there was so little snow there then.
A：may not be
B：won’t be
C：couldn’t be
D：mustn’t be
答案(点此获取答案解析）
C
在区间（0，1）内恰有一个零点，则实数a的取值范围是（ ）
