A.商业银行B．证券经纪人C．信托投资公司D．证券经营机构公开发行股票应由( )承销,承销包括包销和代销两种。……

判断题若f(x)，g(x)都在[a，b]上可积，且f(x)＜g(x)，则当a＜b时，必有∫a→xf(t)dt可导．( )

判断题The Letter of credit shall be examined only by the exporter.

判断题Offer and counter-offer are two indispensable steps to reach an agreement.

判断题Acceptance should be declared only by written form.

判断题After the exclusive distributor has purchased the goods, the actual buyer shall open an UC.