正确的自感系数单位换算是（）。 A: A1H=10³mH B: B1μH=10³mH C: C1H=10⁶mH D: D1μH=10⁶mH

【单选题】O(1) , O(10000logn ), O(n!) , O(nlogn) , O(n 2 ) , O(10 5 n) , O(0.0001n 3 ) , O(2 n ) , O(10 -9 n 3 +2n+100)中时间复杂度最高的是 A. O(n!) B. O(10000logn ） C. O(10 5 n) D. O(2 n )

菱铁矿的主要成份是（）。 A: Fe₂O₃ B: Fe₃O₄ C: nFe₂O₃•mH₂O D: FeCO₃

将两个1 mH的电感并联在一起（无互感顺并），其等效电感是（ ）。 A: 2 mH B: 1 mH C: 0.5 mH D: 3 mH

1Mpa=10mH2O。（)

Conversation 17.A) At 2 o'clock this afternoon. B) At 3 o'clock this afternoon. C) At 10 o'clock this morning. D) At 10 o'clock tomorrow morning. A: At 2 o'clock this afternoon. B: At 3 o'clock this afternoon. C: At 10 o'clock this morning. D: At 10 o'clock tomorrow morning.

Until what time will the tornado watch be in effect A: 10 o'clock tonight. B: 2 o'clock in the morning. C: 2 o'clock in the afternoon. D: 10 o'clock in the mornin

1at=10mH2O=760mmHg。

1H等于（ ）mH 未知类型：{'options': ['', '', '', '10'], 'type': 102}

儿童CPAP治疗的常用压力范围是（） A: 0～1cmH₂O B: 2～3cmH₂O C: 4～6cmH₂O D: 7～10cmH₂O E: 10～15cmH₂O