一般局部钙量变化大于多少时，X线开始显示异常（）
A.10%～30%
B.30%～50%
C.50%～70%
D.70%～90%
E.>90%
参考答案：B
The girl planned to have dance lessons at the training centre with her friend ______ she would stay for an hour.
A．who
B．where
C．what
D．which
外资企业内部处置资产，包括除将资产转移至境外以外，均不确认收入，相关资产的历史成本延续计算。( )
