图样中的比例是2：1是指：实际机件要素的线行尺寸比图样中机件要素的线性尺寸大2倍。
参考答案：错
—What do you think we can do for our aged parents?
—You________do anything except to be with them and be yourself.
A．don't have to
B．oughtn't to
C．mustn't
D．can't
根据客户与营销人员的关系来划分，基金销售的潜在客户可分为重要客户、次要客户和普通客户。( )
