题目

Do you know the popular online words“China’s four great inventions”. Beijing Foreign Studies University surveyed young people from 20 countries a few months ago.【1】.They are high-speed trains,bike sharing,cashless payment(无现金支付) and online shopping。Chinese didn’t create them, but they are using them.So people’s lives are getting more and more different. China’s new high-speed train,Fuxing,made its first running at 350 km/h on the railway between Beijing and Shanghai on Sept 21.If you take common trains to travel between the two cities,it may take more than 15 hours 19．在四个心腔中，左心房的壁最厚．×（判断对错）