问题
选择题
Dictionaries are important to US students. When We meet a new word, We can _______ in them. [ ]
A. look it up
B. look up it
C. look for it
D. look them up
答案
答案：A
搜题请搜索小程序“爱下问搜题”
Dictionaries are important to US students. When We meet a new word, We can _______ in them. [ ]
A. look it up
B. look up it
C. look for it
D. look them up
答案：A
CH3OH(g)的能量情况如图所示，曲线I和曲线Ⅱ分别表示不使用催化剂和使用催化剂的两种情况。下列判断正确的是