某种生物孢子的直径为0.00063m,用科学记数法表示为[ ]
A.0.63×10﹣3m
B.6.3×10﹣4m
C.6.3×10﹣3m
D.63×10﹣5m
— Are you still thinking about yesterday’s game?
— Oh, that’s ____________.
A.what makes me feel excited
B.whatever I feel excited about
C.how I feel about it
D.when I feel excited