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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

6. 下列哪一個分子的酸性最強? (A) CH3CH2CO2H (B) CH3CHFCO2H (C) CH3CHClCO2H (D) CH2BrCH2CO2H

698.Which of the following statements is incorrect? (A) Large vehicles on roads with 3 or more lanes in thesame direction shall not drive in the inner lane except when preparing to turn left. (B) Small vehicles maydrive in both inner and outer lanes; when driving at a slower speed, they should drive in the outer laneand may change lanes arbitrarily. (C) Except when preparing to stop or making a temporary stop,vehicles shall not drive beyond the road edge line or straddle two lanes.

699.When a vehicle is in motion and wishes to overtake the vehicle ahead in the same lane, the driver shallsignal with the left turn indicator and maintain a gap of at least how many meters from the left side of thevehicle ahead before overtaking, then signal with the right turn indicator and merge back into the originallane after reaching a safe distance: (A) 0.5 meters. (B) 1 meter. (C) 2 meters.