20160111 One question per day
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20160111 Daily Question: The rewards are as follows: 1–3 points for correct answers, 3–5 points for additional correct answers. For Category I lightning protection buildings, the rolling sphere radius for the lightning receptor arrangement is ( ) meters, and the lightning protection grid size should be ≤( ) or ≤6×4 meters. A.25 B.30 C.10×5 D.5×5 The answers are B and D
For the first category of lightning protection buildings, the rolling sphere radius for the lightning receptor placement is (B, 30) m, and the lightning protection grid shall be ≤(D, 5*5) or ≤6×4 m.
B D~~~~~~~~~~~~~~~~~~~~
For the first category of lightning protection buildings, the rolling sphere radius of the lightning receptor arrangement is (B) meters, and the lightning protection grid shall be ≤(D) or ≤6×4 meters. A.25 B.30 C.10×5 D.5×5
For the first category of lightning protection buildings, the rolling sphere radius of the lightning receptor arrangement is (B) meters, and the lightning protection grid shall be ≤(D) or ≤6×4 meters. A.25 B.30 C.10×5 D.5×5
For the first category of lightning protection buildings, the rolling sphere radius for the lightning receptor arrangement is (B.30) m, and the lightning protection grid size is ≤(D.5×5) or ≤6×4 m.