1.
Research on the Back-flowing of Knowledge and Technique in the Progress of Country Modernization;
农村现代化进程中的智力回流问题研究
2.
A Preliminary Analysis of the Return of Manual Worker Sisters and Reflections to Speciality of Social Work;
浅析打工妹的回流问题与社会工作的专业反思
3.
Simulation of Reverse Flow in Low Specific Speed Double Suction Centrifugal Pump
低比转数双吸离心泵回流问题的CFD研究
4.
A Research on the Returning Geographical Choices of Returning Migrant Rural Workers;
回流农民工的回流地域选择问题研究
5.
The Study of Network Maximal-flow Problem and the Location of the Recycling Center;
网络最大流及回收中心选址问题研究
6.
Research on Reverse Logistics and Electronic Products Recycling;
电子废旧产品回收物流若干问题研究
7.
An Economic Analysis of the Rural Labor Reflow
农村劳动力“回流”问题的经济学分析
8.
Recycling reversion physical distribution existence question and dealing with strategy
回收逆向物流存在的问题和应对策略
9.
Retrospect and Prospect of the Study on the Loss and Return of the Chinese Cultural Relics
中国文物的流失与回归问题研究的回顾与前瞻
10.
Research on Some Key Issues in Recovery Processing of Manufacturer's Reverse Logistics;
企业逆向物流回收处理若干关键问题研究
11.
Research on the Design of Recycling Network of Electronic Waste;
电子废弃物回收逆向物流网络设计问题研究
12.
Study on the Vehicle Routing Problems with Backhauls of Reverse Logistics;
带回程取货的逆向物流车辆路径问题研究
13.
Research on End-of-Life Vehicles Recovery and Recycling Based on Reverse Logistics;
基于逆向物流的报废汽车回收问题研究
14.
Study on Transportation Strategy of Vehicle in Reverse Logistics with Split Pick-ups
回载可分的逆向物流运输策略问题研究
15.
Resolve the matter through revamping trim of carbon-ammonia liquid returnvalve jam problem
通过内件改造解决碳氨液回流阀卡涩问题
16.
IV. Listen and answer
听独白，回答问题。
17.
V. Read the passage and choose the correct answer.
读短文，回答问题。
18.
Section F Listen to the passage and answer the questions.
听短文，回答问题。