20151225 One question per day
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20151225 Daily Question: The rewards are as follows: 1-3 points for participation, 3-5 points for correct answers along with an analysis. Lightning rods should be made of round steel or welded steel pipes; when the length of the rod is 1-2 meters, what is the diameter of the round steel in mm?； The diameter of the steel pipe is ( ) mm. A.12 B.16 C.20 D.25 Answer: B, D
Lightning rods should be made of round steel or welded steel pipes; when the rod length is 1–2 meters, the diameter of the round steel should be (B) mm； The diameter of the steel pipe is (C) mm. A.12 B.16 C.20 D.25
#Here is a quick response: #Lightning rods should be made of round steel or welded steel pipes; when the rod length is 1–2 meters, the diameter of the round steel should be (16) mm； The diameter of the steel pipe is (25) mm.
Lightning rods should be made of round steel or welded steel pipes; when the rod length is 1–2 meters, the diameter of the round steel should be (BD) mm； The diameter of the steel pipe is ( ) mm. A.12 B.16 C.20 D.25
Lightning rods should be made of round steel or welded steel pipes; when the rod length is 1–2 meters, the diameter of the round steel should be (A) mm； The diameter of the steel pipe is (A) mm.
Lightning rods should be made of round steel or welded steel pipes; when the rod length is 1–2 meters, the diameter of the round steel should be (A) mm； The diameter of the steel pipe is (C) mm. A.12 B.16 C.20 D.25
Lightning rods should be made of round steel or welded steel pipes; when the rod length is 1–2 meters, the diameter of the round steel should be (B) mm； The diameter of the steel pipe is (D) mm. A.12 B.16 C.20 D.25