（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.<br>A:As many as<br>B:So many as<br>C:As much as<br>D:As more as

（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
A:As many as
B:So many as
C:As much as
D:As more as

出自：海船船员证

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