第3题: [单项选择]颅内转移性黑色素瘤多来自() A. 消化道 B. 皮肤 C. 骨骼 D. 肺部 E. 软脑膜 参考答案:B 答案解析:黑色素瘤分为原发性和转移性。颅内转移性黑色素瘤多来自皮肤的黑色素瘤经血转移。
第4题: [单项选择]Questions 19 to 21 are based on the conversation you have just heard.A. He has relevant knowledge. B. He is a relative of the landlady. C. He has similar experience. D. He has an apartment for rent. 参考答案:A 答案解析:[解析] Why does the woman turn to the man for help