单项选择题

Bark about 0.2 to 0.8 mm thick occurring in closely packed compound quills made up of single or double quills.Which of the following is not true()

A.皮,厚0.2-0.8mm
B.呈复卷状
C.可由单卷重叠成复卷状
D.可由双卷重叠成复卷状
E.可呈片状