13. 翻譯：氣壓計的讀數穩定。
(A) The Barometric readings are dropping.
(B) The Barometric readings are rising.
(C) The Barometric readings are unstable.
(D) The Barometric readings are steady.

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統計： A(1), B(4), C(2), D(13), E(0) #1231238