不会造成局部义齿摘戴困难的是（）
A.基托进入组织倒凹
B.卡环臂过紧
C.就位方向不对
D.卡臂尖进入倒凹过深
E.基托与黏膜组织不贴合
参考答案：E
Changyu building, _____ a history of more than 700 years, is well-known for its magnificent appearance the quiet and natural surroundings.
A．having; in
B．with; against
C．with; for
D．has; against
埋弧自动焊在其焊接工艺参数不变时，焊丝直径越大则（）。
A.熔深越小
B.强度越好
C.熔深越大
D.熔宽越小
