下列最可能提示恶性卵巢肿瘤的是：
A．肿瘤最大径超过2cm
B．肿瘤形态不规则
C．肿瘤边缘不清楚
D．肿瘤实性部分较大
E．肿瘤内可见钙化
参考答案：D
—Tom must be at home because the light in his house is on.
—He ____ be at home, because I saw him playing basketball on the playground.
A. can B. mustn’t C. can’t
唐三彩釉料是以钙的氧化物作助熔剂，釉面光泽度强。
