主持人要具备较强的口头表达能力，其基本要求是()。
A.口齿清晰
B.语言生动
C.条理清楚
参考答案：A, B, C
The young member made several proposals, none of____ considered practical or acceptable．
A．them
B．which
C．it
D．what
放牧家畜的结构
