建设工程产生的文件材料是建设活动的真实记录，带有非常明显的（）。
A、技术性质
B、专业性质
C、保存性质
D、政策性质
参考答案：B
汉译英：“承兑交单；付款交单；货到即付”，正确的翻译为：（）
A．document against acceptance; document against payment; payment against arrival
B．document against payment; document against acceptance; payment against arrival
C．document against acceptance; payment against arrival; document against payment
D．payment against arrival; document against payment; document against acceptance
在脑血管疾病中，起病速度最快的是（）。
A.脑血栓形成
B.脑栓塞
C.脑出血
D.蛛网膜下腔出血
E.腔隙性脑梗死
