下列何药对骨肉瘤疗效好：
A．博来霉素B．丝裂霉素C．多柔比星D．环磷酰胺E．氟尿嘧啶
参考答案：C
He _______ speak to his mother like that.
A ought not to B. doesn’t ought to C not ought to D ought to not
小儿身长上部量与下部量相等的时间是（）。
A.出生时
B.2岁时
C.6岁时
D.12岁时
E.15岁时
