3岁男孩突发性腹痛,大便有血,腹部可触及包块,下述疾病哪一种可能性大:
A．坏死性小肠炎
B．小肠扭转
C．小肠肿瘤
D．肠套叠
E．急性阑尾
参考答案：D
I don’t know when my father ______back , but I’ll tell you when he ______back.
A．comes; comes;
B．come;come
C．come; will come
D．will come; comes
怎样提高播音员的素质和修养？
