液体产品计量方式有：（）
A、人工检尺计量
B、流量计计量
C、衡器计量
D、自动计量
参考答案：A, B, C
It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．
A．when; which
B．when; that
C．that; which
D．that; that
企业将现金存入银行或从银行提取现金，可以只编制付款凭证，不编制收款凭证。( )
