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问题 单项选择题

以下疾病中，易早期血行转移或淋巴道转移的是（）

A.鳞状细胞癌

B.基底细胞癌

C.恶性黑色素瘤

D.毛母质瘤

E.皮肤Paget病

答案

参考答案：C

补全对话，情景问答
根据对话的情景，从方框中选择适当的句子填在画线处，使对话完整通顺。其中有两项是多余的。
A:    1    Could you tell me where the nearest bus stop is, please?
B:    2    You can ask that cleaner over there.
A:    3    
B: You are welcome.
A: Excuse me.    4   
C: Yes. Walk along this road,and turn left at the first turning.
    It's about 100 metres long on the left.
A: Thanks a lot.
C:   5    
A. Thank you all the same.
B. It's my pleasure.
C. Is there a bus stop near here?
D. Excuse me.
E. Thank you very much.
F. I'm sorry. I don't know.
G. It's very near.
1._____ 2._____ 3._____ 4._____ 5._____
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单项选择题

不等圆绝缘线芯三大一小，d1（工作绝缘线芯直径）比d2（中性绝缘线芯直径）的比值b为0.997时，成缆外径计算公式为（）mm。

A.2.3d1

B.2.25d1

C.2.35d1

D.2.4d1
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