我国中央象台对未来24小时可能影响我国沿海的热带气旋发布（）
A.消息
B.警报
C.紧急警报
D.A、B、C都对
参考答案：C
The voyages of travellers before the 17th century show that they were not ________ the sea even though they didn’t have modern navigational aids.
A．at the expense of
B．at the risk of
C．in the way of
D．at the mercy of
患者，男，64岁，反复咳嗽、咳痰、痰中带血2周。体温38.3℃，白细胞12×109/L，胸片见右肺门肿块影，伴远端大片状阴影，抗感染治疗阴影不吸收。最有可能的诊断是
A．肺化脓症B．肺炎C．肺癌D．肺结核E．支气管扩张
