这种肿瘤不易
A．血行转移
B．直接侵犯邻近淋巴结
C．区域淋巴结转移
D．沿血管、神经束生长
E．侵犯面神经
参考答案：C
—What was your brother like when he was young?
—He ______ be quiet, but now he's very outgoing. [ ]
A. was used to
B. used to
C. used by
D. was used for
以下辅助检查中，最有助于判断腹泻脱水性质的是（）
A.血钾浓度
B.血钠浓度
C.心电图
D.血pH
E.24小时尿量
