临床愈合标准中哪一项是不正确的：
A．局部无压痛
B．无纵轴叩击痛
C．X线骨折线模糊
D．大量骨痂形成
E．能适当的负重活动
参考答案：D
She had just finished her homework_____her mother asked her to practice playing the piano yesterday. [ ]
A. when
B. while
C. after
D. since
尿素高压系统操作压力（）操作温度下甲铵的分解压力（离解压力）。
A.大于
B.等于
C.小于
D.以上都不是
