Four years ago, when Xie Wanju, a mili-tary veteran, was selected to head the poverty alleviation work in Zhadong, a mountainous village in Hechi, Guangxi Zhuan
雌激素是影响生物免疫功能和生殖系统的一类物质,会影响生物体的性行为、生殖功能、免疫系统和神经系统,甚至会使生物的雌雄比例失调,最终导致该物种的灭绝,故建立雌激素的监测研
The top 500 private enterprises in China have all registered growth in 2019, with the city of Hangzhou in Zhejiang Province, east China, maintaining its reputat
At the high-level meeting to commemorate the 75th anniversary of the UN, President Xi Jinping urged all countries to oppose unilat-eralism, bullying and acting
传统的由铬铁矿生产铬盐是重要的化工与冶金基础原料工业。目前我国采用的高温氧化-钠化焙烧法传统工艺,要排放出大量高毒性铬渣及含铬粉尘废气,严重污染环境。而本文所研究
石墨烯具有非凡的力、热、光和电学性能,是具有广阔发展前景的制备金属基复合材料的增强相。本文将石墨烯加入快速镍电刷镀液中,制备出石墨烯均匀悬浮分散的镍-石墨烯复合电刷
Though 75 years have elapsed, the aspira-tion and founding mission of the United Nations—world peace and development—must not change.
Millions of farmers celebrated the third harvest festival on September 22, antici-pating a bumper crop. Despite floods in the south, droughts in the north, typh