皮皮学，免费搜题
登录
搜题
【简答题】
你已经使用read.csv()命令打开了一个数据文件，并命名为data1，现在你想在R中打开data1，应该使用的命令是_____。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】The so-called Lyman series of lines in the emission spectrum of hydrogen corresponds to transitions from various excited states to the n = 1 orbit. Calculate the wavelength of the lowest-energy line i...
【单选题】The pH inside endosomes is about 5.0, and the pH in the cytosol is about 7.0. Calculate the amount of free energy needed to maintain this acidity difference at 37°C. Ignore the effects of the transmem...
A.
10.9 kJ/mol
B.
11.9 kJ/mol
C.
12.9 kJ/mol
D.
13.9 kJ/mol
【单选题】Which process could be used to calculate the bond energy for the covalent bond X-Y by dividing its ∆H by n?
A.
XYn(g) → X(g) + nY(g)
B.
2XYn (g) → 2XYn-1(g) + Y2(g)
C.
Y(g) + XYn-1(g) → XYn(g)
D.
nXY(g) → nX(g) + 2n Y2(g)
相关题目：