Listen and choose the best answer.
A. 8400m.
B. 8900m.
C. 8100m.
D. 6300m.
查看答案
Listen and choose the best answer.
At 6000m or above.
B. At 6000m or below.
C. At 6600m or above.
D. At 7500 or below
Listen and choose the best answer.
At 52.
B. At 52 or later
C. At 52 or earlier
D. Before 52.
Listen and choose the best answer.
A. TWA
B. PTA
C. BVL
D. WRY
工程中，图纸幅面有几种？
A. 2
B. 3
C. 4
D. 5
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