起自骨盆缘的结构是（）
A.卵巢固有韧带
B.卵巢系膜
C.输卵管系膜
D.卵巢悬韧带
E.子宫圆韧带
参考答案：D
在土壤侵蚀容许量标准中；规定了我国主要侵蚀类型区的土壤容许流失量，其中北方土石山区的土壤容许流失量是( )。
A．200 t/(km2·
B．300 t/(km2·
C．500 t/(km2·
D．1000 t/(km2·
Nowadays, many people walk to work Copenhagen Conference calling for living alow-carbon
lifestyle to cope with global warning. [ ]
A. in relation to
B. in response to
C. in addition to
D. in opposition to
