【单选题】下列关于疝的描述,正确的是?
A.
初发新疝孔,由于刚刚发生,肌纤维断裂后收缩,疝孔变厚。
B.
陈旧性疝孔,由于发生较久,肌纤维断裂后未再生,导致疝孔边缘变薄。
【判断题】水体中的微生物分为清水型水生微生物和腐生型水生微生物。
【单选题】The master got permission to pump out 500 tons of clean sea water for ______.
A.
the purpose of trimming
B.
the approval for ballast
D.
the approval for operation
【判断题】Jane says the sea is clean.
【单选题】An engineer has designed _______ robot that can work in _______ deep sea to clean waste.
【单选题】Permission is requested to pump out about 200 tons of clean sea ballast water for ______ purposes.
【单选题】Permission is kindly ______ about 1000 tons of clean sea water ballast,as and when required for trimming purposes.
C.
requesting to pump out
D.
requesting pumping out
【单选题】下列关于疝的描述,正确的是?
A.
疝内容物常见的有小肠肠襻、网膜,瘤胃、真胃,子宫、膀胱。
C.
与血肿、脓肿、蜂窝织炎、肿瘤相比,疝最突出的特征是有固定的解剖部位。
【判断题】水体中的微生物分为清水型水生微生物和腐生型水生微生物。