A.easier
B.newer
C.earlier
D.higher
A. school B. year C. education D. program
A.lucky for
B.slow at
C.open to
D.afraid of
下列叙述正确的是(用NA代表阿伏加德罗常数的值)
A.2.4g金属镁变为镁离子时失去的电子数为0.1NA
B.1molHCl气体中的粒子数与0.5mo1/L盐酸中溶质粒子数相等
C.在标准状况下,22.4LCH4与18gH2O所含有的电子数均为10NA
D.CO和N2为等电子体,22.4L的CO气体与lmolN2所含的电子数相等
Which of the following found a new way for its development?
A.The Washington Post
B.The Guardian
C.The New York Times.
D.New England Courant