有两个弹簧,质量忽略不计,都是 10 cm ,第一个弹簧上端固定,下挂一个质量为 m 的物体后,长 11 cm ,而第二个弹簧上端固定,下挂一质量为 m 的物体后,长 13 cm ,现将两弹簧串联成20 cm长的 弹簧 ,上端固定,下面仍挂一质量为 2 m 的物体,则两弹簧的总长为 _____ cm 。
【单选题】Please analyze the logical fallacy in the following statement: In the last month, fourteen students have been arrested in California for using drug. That state is obviously filled with young addicts.
【单选题】Please analyze the logical fallacy in the following statement: Religion obviously weakens the political strength of country. After all, Rome fell after the introduction of Christianity.