Experiments of this kind ___in both the U.S and Europe well before the Second World War.

A．had conducted

B．have conducted

C．have been conducted

D．had been conducted

商业银行贷款，应当遵守下列资产负债比例管理的规定()。

A.资本充足率不得低于4%

B.资本充足率不得低于8%

C.贷款余额与存款余额的比例不得超过75%

D.流动性资产余额与流动性负债余额的比例不得低于35%

E.对同一借款人的贷款余额与商业银行资本余额的比例不得超过10%