下列属于井下生产系统的是（）。
A、提升运输
B、通风
C、供电
D、通讯
参考答案：A, B, C, D
消化道中消化淀粉的消化液是由哪些腺体分泌的？ （ ）
①唾液腺 ②胃腺 ③肝脏 ④肠腺 ⑤胰腺
A．②④⑤
B．①④⑤
C．③④⑤
D．①③⑤
汉译英: “产地证书、熏蒸证书、兽医卫生证书”。( )
A．Certificate of Fumigation; Certificate of Origin; Veterinary Health Certificate
B．Veterinary Health Certificate; Certificate of Fumigation; Certificate of Origin
C．Certificate of Origin; Certificate of Fumigation; Veterinary Health Certificate
D．Certificate of Origin; Certificate of Fumigation; Veterinary Certificate
