_____ this something, still unseen, they gave the name radium.

A．With

B．By

C．At

D．To

药材葛根的性状鉴别特征是（）

A.切面黄白色；体轻质硬，纤维性较强；气微，味微甜

B.切面黄白色；体重质硬，纤维性较弱，富粉性；气微，味微甜

C.切面黄白色；体重质硬，纤维性较强；气微，味苦

D.切面黄棕色；体重质硬，纤维性较弱，富粉性；气微，味极苦

E.切面黄白色；体轻质硬，纤维性较强；气微，味苦