单项选择题
A.blind investmentB.blind investsC.blind investorD.invest
A.they had stored enough food supplies.B.they made much money on oil trade.C.U.S.offered them an attractive discount.D.they passed a bill on setting up its air force.
A.热射病B.热痉挛C.热衰竭D.日射病E.混合型中暑