秦艽是几基原的药材（）

A.二基原

B.三基原

C.四基原

D.五基原

E.六基原

Manila lines in which the strands are right-hand laid（）.

A.should be coiled in a clockwise direction

B.should be coiled in a counterclockwise direction

C.may be coiled either clockwise or counterclockwise

D.should never be coiled