按照国标码的规定，我国的汉字内码大多数采用( )个代码。
A．1
B．2
C．3
D．4
参考答案：D
解析：[分析] 一个汉字内码占两个字节。
— Did you go to his birthday party last night?
— No, I____, but I had some extra work to finish. [ ]
A. must have
B. could have
C. could
D. ought to
良、恶性胸膜间皮瘤的鉴别（）
A.胸膜增厚伴大量胸腔积液，多为恶性
B.纵隔胸膜增厚一起形成环形增厚包绕肺组织，多为恶性
C.胸膜明显增厚超过2cm时几乎都是恶性
D.胸膜增厚呈结节状或肿块状多为恶性
E.纵隔固定无移位，多为恶性
