旋压头动平衡差会出现哪些情况：（）
A．外表面花纹
B．高速电机声音异常大
C．米克重变化大
D．外表面划伤
参考答案：A, B, C
Perhaps the best sign of _____ computer and internet use pushes up demand for paper comes from the high-tech industry itself.
A．how
B．what
C．why
D．that
胆固醇不能转变成
A．胆色素
B．醛固酮
C．雄激素
D．雌激素
E．维生素D
