胃癌()食管静脉曲张破裂()溃疡性结肠炎()
A.大量呕血、柏油样便
B.粪隐血持续阳性
C.大便后滴鲜血
D.剧烈呕吐后呕鲜血
E.粘液血便伴里急后重
参考答案:B,A,E
that they may eventually reduce the amount of labor needed on construction sites by 90 per-cent. [ ]
A. Such construction robots are clever
B. So clever the construction robots are
C. So clever are the construction robots
D. Such clever construction robots are
按照物流的()划分,可以分为供应物流、销售物流、生产物流、回收物流和废弃物物流。
A.不同作用
B.不同空间范围
C.不同性质
D.不同功能