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问题 多项选择题

CT增强扫描无强化改变的是（）.

A.慢性脓肿

B.囊肿

C.血肿

D.肿瘤中心坏死区

E.腹腔恶性肿瘤

答案

参考答案：B, C, D

解析：BCD均无明显强化。

选择题

President Obama has restated his call for high earners in ______ United States to pay more in____ taxes , in his first news conference since winning re-election.

A．the; /

B．/;/

C．/;the

D．a; the
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判断题

买券还券是指客户通过其信用证券账户申报买券，结算时买入证券直接划转至证券公司融券专用证券账户的一种还券方式。( )
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