美国总统特朗普下令，自3月12日起对所有进口到美国的钢铝产品加征25%的关税。行政令还取消了对加拿大、墨西哥和巴西等多国的免税政策和配额。
特朗普还要求所有进口钢铝产品符合北美的熔铸标准，以遏制最低限度加工的中国钢铝产品进口到美国。
数据显示，美国的进口钢铁主要来自加拿大、巴西、墨西哥和韩国。分析认为此举将打击这些美国盟友。
（路透社，美联社）
BY 竹新社
Telegram has no known backdoors and, even though it is come in for criticism for using proprietary encryption methods instead of open-source ones, those have yet to be compromised. While no messaging app can guarantee a 100% impermeable defense against determined attackers, Telegram is vulnerabilities are few and either theoretical or based on spoof files fooling users into actively enabling an attack.
Telegram is a cloud-based instant messaging service that has been making rounds as a popular option for those who wish to keep their messages secure. Telegram boasts a collection of different features, but it’s best known for its ability to secure messages and media by encrypting them during transit; this prevents third-parties from snooping on messages easily. Let’s take a look at what Telegram can do and why you might want to use it.
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