当偏振光通过长1dm,每1ml中含有旋光性物质1g的溶液,在一定波长与温度下测得的旋光度,用[α]tD表示,称为
A.熔点B.比旋度C.相对密度D.旋光度E.折光率
参考答案:B
压疮
Please supply us with 250 tons of fresh water. You are requested to deliver it on board().
A.till Friday
B.on Friday at the latest
C.until Friday afterwards
D.at Friday soonest