12.Heisalways________andneverfeelstireD.-X题卡

x＞2 x≠2 x≠0 x≠2且x≠0

[He]2S2 [Ne]3S23P2 [Ne]3S23P4 [Ar]3d64S3

always loses is always losing has always lost will always lose

always plays always played plays always played always

always forgets will always forget is always forgetting has always forgotten

x≠3 x≠2 x≠2或x≠3 x≠2且x≠3

He、Ne、Ar Na＋、Mg2＋、Al3＋ NH4＋、OH－、F.－ Ne、H2O、NH3

he doesn’t always make he isn’t always making he didn’t always make he wouldn’t always making

him; that it; it himself; it himself; that

was always is always always was always is

Cl和Cl﹣ CO2和CO H和He He和Ne

always lost 　 always loses 　 is always losing 　 will always lose

He=26.02m，Ne=2725W He=26.5m，Ne=2777W He=10.5m，Ne=1100W He=26.5m，Ne=2415W

²²Ne的质子数为12 ²⁰Ne和²²Ne的中子数相同
²⁰Ne和²²Ne的质量数相同 ²⁰Ne和²²Ne互为同位素

That always a diligent student Always a diligent student Always to be a diligent student Diligent student as he is

²⁰Ne和²²Ne的中子数相同 ²²Ne的质子数为12 ²⁰Ne和²²Ne的质量数相同 ²⁰Ne和²²Ne互为同位素

F Ne He C.

always study always is studying is always studying studies always

12.He is always ________and never feels tireD.