单项选择题

民用爆破物品是广泛用于矿山爆破、开山辟路、水利工程、地质探矿和爆炸加工等许多领域的消耗材料。下列民用爆破物品中，属于专用民爆物品的是（　　）

A.水胶炸药
B.乳化炸药
C.射孔弹
D.磁电雷管

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听力原文： Stocks can be divided into two categories: those for trading and those for investing. Within trading stocks, you make money by figuring out whether other traders will keep buying or start selling the stock and positioning yourself accordingly for a few weeks or even days. By contrast, with investing stocks you aim to buy into a company at an attractive price, given the worth of its assets and likely future profits, regardless of when the value will be recognized by the market. This way, you can steer clear of overpaying for fashionable dogs.There's nothing revolutionary about this strategy, of coursE.It's just a question of calmly mixing and matching some old, and apparently somewhat contradictory, stock market wisdom and applying it to a hot market. About 70 years ago, British economist John Maynard Keynes said investors should view the market as a beauty contest, and they should mainly buy trading stocks that other people would find attractivE.Benjamin Graham, the father of modem securities analysis, bristled at that ideA.He lamented that stock buyers, though almost always called investors, are often actually speculators. Instead, he preached that they should make a hardnosed assessment of the inherent value of companies and search out investing stocks.What is the most appropriate title for this passage?A.Two Types of StocksB.A New Strategy of InvestmentC.Distinctions between Trading and InvestmentD.Conflicting Perspectives on Stock Investment

A.B.
What
C.Two
D.A
E.Distinctions
F.Conflicting

单项选择题

某烟花爆竹生产企业开展安全生产现状评价，根据《烟花爆竹工程设计安全规范》（GB 50161），关于总药量计算的说法，正确的是（）。

A.防护屏障中的危险品药量，可不计入总药量
B.厂房生产线上的危险品药量，可不计入总药量
C.滞留的危险品药量，可不计入总药量
D.抗爆间室的危险品药量，可不计入总药量

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