描述一组数据波动情况的量数称为差异量数。（）
参考答案：对
--- It’s said that another new car factory _______ now.
--- Yeah. It ________ one and a half years.
A．is building; will take
B．is built; will take
C．is being built; will take
D．is being built; takes
中央银行提高法定存款准备金率会起到降低通货膨胀压力的效果。______
