环形炉炉底中心平均直径为()。
参考答案:35米
Sometimes customers can't help _____ the things they don't really need. [ ]
A. persuading to buy
B. to be persuaded into buying
C. being persuaded to buy
D. to persuade into buying
《野生药材资源保护管理条例》规定,国家对野生药材资源管理实行的原则是()
A.保护禁止采猎
B.保护药材生长环境
C.人工培育药材品种
D.建立自然保护区
E.保护、采猎相结合