32. 無線電波高頻（HF）的頻率範圍是多少？ (A) 3～30 GHz (B) 300～3000 MHz (C) 30～300 MHz (D) 3～30 MHz

32. 無線電波高頻（HF）的頻率範圍是多少？
(A) 3～30 GHz
(B) 300～3000 MHz
(C) 30～300 MHz
(D) 3～30 MHz

答案：登入後查看
統計： A(42), B(98), C(167), D(426), E(0) #2679251

詳解 (共 2 筆)

樂佩

B1 · 2023/11/30

#5976472

必背無線電波高頻（HF）8414.5kH...

(共 48 字，隱藏中）

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鼠鼠

B2 · 2025/02/17

#6309395

9. By SMCP, choose one of the following sentences for expressing ”Depth as indicated in chart must be reduced by 1 meter due to sea state.” (A) “Information: depth of water must be reduced by 1 meter due to sea state”. (B) “Information: depth of water must be decreased by 1 meter due to sea state”. (C) “Information: charted depth must be 1 meter due to sea state” (D) “Information: charted depth of water must be decreased by 1 meter due to sea state”.

32. 無線電波高頻（HF）的頻率範圍是多少？
(A) 3～30 GHz
(B) 300～3000 MHz
(C) 30～300 MHz
(D) 3～30 MHz

詳解 (共 2 筆)

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