根据提交给美国证券交易委员会的文件显示,Comfort Systems USA Inc. (NYSE:FIX)的执行副总裁兼首席运营官Trent T. McKenna最近进行了一系列股票交易。11月22日,McKenna以平均每股484.81美元的价格出售了4,000股Comfort Systems普通股,总计约194万美元。
The Shenzhou-18 spacecraft has returned to Earth with 34.6 kilograms of space station experimental samples, encompassing microorganisms, alloy materials and nanomaterials that are difficult to prepare ...