电子邮件由两部分组成，它们分别是邮件头和______。
参考答案：邮件体
. He made _____ known to his friends that he didn’t want to enter politics.
A．that
B．it
C．himself
D．him
马拉色菌毛囊炎易伴发的疾病有()
A．花斑癣
B．银屑病
C．脂溢性皮炎
D．湿疹
