塑料全冠不可用于
A．修复前牙切角缺损B．诊断性修复体C．暂时修复体D．修复前牙过小牙E．修复磨牙外形
参考答案：E
集合A={x|2≤x≤6}，B={x|2a≤x≤a+3}，若A∩B=B，则实数a的取值范围是______．
He is such a lazy man _______ nobody wants to work with ______. [ ]
A. that; /
B. as; him
C. whom; him
D. as; /
