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S1:Pan-Pan Pan-Pan Pan-Pan. New Harbour Control, New Harbour Control, New Harbour Control, New Harbour Control. This is Motor vessel Birth. Call sign Delta Alpha Mike Kilo. My position is six two degrees one one decimal eight minutes north, zero zero seven degrees four four minutes east. All of my mooring lines are broken due to strong wind. We will collide with other ships at any moment. We need a tug and a mooring boat to make fast again. Please come to assist me as soon as possible.S2:Motor vessel Birth. Pan-Pan received. This is Newharbour Control. We will send a tug assist you at once, but the line boat will come to you 15 minutes later. Please take necessary measures to avoid collision, the tug will make fast on your port side, your crew standby now. Contact me on VHF 16. Over. Q4:What action does not New Harbour Control take?A.
Keeping in contact with Motor Vessel Birth on VHF 16.
B.
Giving some instructions to Motor Vessel Birth.
C.
Sending a tug to assist Motor Vessel Birth.
D.
Sending a line boat to help Motor Vessel Birth at once.
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【简答题】薄层色谱法常用定量分析的方法有 、 和 。
【单选题】用一单程列管换热器以冷凝 1.5kg/s 的有机蒸汽,蒸汽在管外冷凝的热阻可以忽略,冷凝温度 60 °C,汽化热为 395Kj/kg 。管束由 ɸ 25mm ×2.5mm的钢管组成,管内通入t 1 =25°C的河水做冷却剂,不计垢层及管壁热阻,试求:(1)冷却水用量(选择冷水出口温度);(2)管数n与管长L(水在管内的流速可取1m/s左右);(3)若保持上述计算所得的总管数不变,将上述换热器制成双...
A.
10.9Kg/s；36；2.06m；2.24Kg/s
B.
10.9Kg/s；46；2.06m；2.24Kg/s
C.
10.9Kg/s；36；2.60m；2.42Kg/s
D.
10.9Kg/s；36；2.06m；2.42Kg/s
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