问题
选择题
1 will travel around the world in the future because I enjoy _____ new places. [ ]
A. visit
B. to visit
C. visiting
D. visited
答案
答案:C
1 will travel around the world in the future because I enjoy _____ new places. [ ]
A. visit
B. to visit
C. visiting
D. visited
答案:C
气体打火机使用的有机燃料,稍加压降温即可液化,减压(打开阀门)很容易气化,遇明火燃烧,你认为符合这种条件的有机燃料是 ( )
A | B | C | D | |
化学式 | C2H6 | C3H6 | C4H10 | C5H12 |
沸点(℃) | -88.6 | -42.1 | -0.5 | 36.1 |
熔点(℃) | -183.3 | -189.7 | -138.4 | -129.7 |