【单选题】The United States Declaration of Independence was drafted and signed in
【单选题】配制100ml0.5%盐酸普鲁卡因溶液,需加入多少克氯化钠使其成等渗(1%盐酸普鲁卡因水溶液的冰点下降度数为0.12°C,1%的氯化钠水溶液的冰点下降度数为0.58°C)
【判断题】已经放入“回收站”的文件是不能被恢复的。( )
【判断题】处方严格来说,它具有法律,技术,经济的意义
【单选题】From the information in the passage, it can be concluded that the United States______.
A.
wanted to build a canal because it was considering starting a war
B.
felt that building a canal through Panama was worth the risk of ruining relations with Colombia
C.
believed that a canal through Nicaragua would be profitable
D.
had lost the Spanish-American War
【判断题】处方严格来说,它具有法律,技术,经济的意义。()
【单选题】方剂药味加减变化中,不包括方中哪种药物的加减变化
【简答题】使用NumPy完成矩阵的基本运算。 (1) 使用randn函数构建两个正态分布的矩阵对象。 (2) 实现上述两个矩阵的加法、减法、乘法、数乘运算。 (3) 实现上述矩阵的转置、内积运算。 (4) 求解上述矩阵的绝对值、余弦值。