以下不符合渗透机制要求的企业是（）。 ["A.属于中国银行积极增长类和选择性增长类行业（执行中银险[2009]1号文规定）","B.信用评级为Ⅰ、Ⅱ类客户","C.在主要竞争银行有一年以上授信关系，且非主要竞争银行主动退出客户","D.信用评级为CCC客户"]
下列有关核酶之叙述哪一项正确（） ["在原核生物细胞中为70s而在真核生物细胞中为80s","在原始细胞的线粒体及叶绿体中发现，但不存在于现今细胞中","可能为一类可分解DNA的酶","可能为一类在早期地球上兼具有分解及合成能力的酶"]
根据国际标准，目前集装箱的重量为（）。 ["21t","22t","23t","24t"]
Badly leaking refrigeration compressor discharge valves will cause（）. ["overfeeding of the expansion valve","damage to the condenser","constant running of the compressor","flooding of the receiver"]
The securing of passenger cars on a Ro-Ro vessel requires（）. ["simple and lightweight equipment","low labor intensive equipment","specially designed equipment to avoid vehicle damage","All of the above"]
什么是细胞内受体？
