PS（poly styrene)是（)

You are to load styrene in bulk，which is subject to self-polymerization．You must ______．

A.Not carry any cargo in the tanks surrounding the tank loaded with styrene

B.Inject nitrogen to pad any ullage above the styrene to prevent contact with oxygen

C.Be furnished with a Certificate of Inhibition to be maintained on the bridge

D.Use heating coils to maintain the styrene within the temperatures specified by the shipper

A.ABS （Acrylonitrile Butadiene Styrene） 材料

B.HDPE(High Density Polyethylene) 高密度聚乙烯材料

C.PC (Polycarbonate)聚碳酸酯材料

D.FRP(Fiberglass Reinforced Plastics) 玻璃钢材料

A.ABS （Acrylonitrile Butadiene Styrene） 材料

B.HDPE(High Density Polyethylene) 高密度聚乙烯材料

C.PC (Polycarbonate)聚碳酸酯材料

D.FRP(Fiberglass Reinforced Plastics) 玻璃钢材料

A.ABS （Acrylonitrile Butadiene Styrene） 材料

B.HDPE(High Density Polyethylene) 高密度聚乙烯材料

C.PC (Polycarbonate)聚碳酸酯材料

D.FRP(Fiberglass Reinforced Plastics) 玻璃钢材料

A.ABS （Acrylonitrile Butadiene Styrene） 材料

B.HDPE(High Density Polyethylene) 高密度聚乙烯材料

C.PC (Polycarbonate)聚碳酸酯材料

D.FRP(Fiberglass Reinforced Plastics) 玻璃钢材料

A.P/V valves with galvanized parts must be replaced

B.Authorization to carry styrene must be endorsed on the Certificate of Inspection

C.You must have a Certificate of Inhibition provided by the shipper

D.The cargo tank heating coils must be blanked off

A.poly（A）序列被poly（A）结合蛋白降解

B.所有真核生物的mRNA都有poly（A）序列

C.由poly（A）聚合酶合成

D.抑制mRNA的翻译