答案:A
答案:A
A. (A)800m
B. (B)900m
C. (C)1000m
D. (D)1100m
A. (A)0.09s
B. (B)0.08s
C. (C)0.07s
D. (D)0.06s
A. (A)15km/h
B. (B)20km/h
C. (C)60km/h
D. (D)8Okm/h
A. (A)100%
B. (B)50%
C. (C)30%
D. (D)10%
A. (A)BMF
B. (B)WDT
C. (C)CTH
D. (D)CHF