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76 距 γ 點射源外某處之曝露率為 12 個單位,若要降至 5 個單位,假設增建因數為 1.0,則需在兩者之 間置入約多少個半值層屏蔽? (A) 2.69 (B) 1.93 (C) 1.54 (D) 1.26

71.「游離輻射防護安全標準」規定,除搶救生命外之緊急曝露人員,劑量儘可能不超過多少? (A)50毫西弗 (B) 100毫西弗 (C)250毫西弗 (D)500毫西弗

71.依據游離輻射防護安全標準,有關緊急曝露人員之劑量規定,下列何者正確? (A)為搶救生命,劑量限値為單一年劑量限度的5倍 (B)為防止嚴重危害,劑量限値為單一年劑量限度之20倍 (C)緊急曝露所接受之劑量,應與職業曝露之劑量合併記錄 (D)為減少大量集體有效劑量,劑量限値為單一劑量限度之2倍

767.Regarding the description of the difference between white arrow 'directional guide lines' painted on theroad surface before an intersection and 'lane-use arrow markings' painted within a lane, which of thefollowing is correct? (A) 'Directional guide lines' are mandatory; vehicles must travel in the direction of thearrow and may not change to another lane. (B) 'Directional guide lines' serve to pre-announce thedirection to be taken at the upcoming intersection, guiding drivers to move into the appropriate lane inadvance; 'lane-use arrow markings' strictly restrict that lane to vehicles traveling in the arrow directiononly. (C) Both serve the same function; they differ only in arrow size and placement location.No. Ans Question

768.Regarding the regulations on seatbelt usage by passengers inside a large bus traveling on a highway orexpressway, which of the following is correct? (A) Only the driver and front-seat passengers are requiredto wear seatbelts. (B) The driver and all passengers aged 4 and above must wear seatbelts. (C) Only thedriver is required to wear a seatbelt; passengers may choose at their own discretion.

769.A median island is installed in the center of the road, with 'Keep Right' and 'Keep Left' compliance signsplaced at each end of the median island respectively. Which of the following descriptions of theirplacement is correct? (A) Both signs are placed on the same side, and the driver chooses which one tofollow based on vehicle speed. (B) The 'Keep Right' sign is placed at the approaching end, directingvehicles to pass on the right side; the 'Keep Left' sign is placed at the departing end, guiding vehiclesback to their original lane. (C) Both signs serve the same function; the arrows point in opposite directionsonly because the road runs in different directions, without affecting the actual travel route.