含糖分和黏液质多而贮于通风干燥处的品种是()
A.天冬
B.党参
C.熟地
D.玉竹
E.肉苁蓉
参考答案:A, B, C, D, E
Mr. Black was so____ to his research that he seldom cared about what happened around him.
A.devoted
B.concerned
C.absorbed
D.used
列车的行驶速度:运爆破材料或大型材料时,不得超过()m/s。
A.1.5
B.2
C.3
D.4