预防食物被黄曲霉毒素污染，最根本的措施是（）
A.防霉
B.去毒
C.防霉和去毒
D.以上都是
E.以上都不是
参考答案：A
--- Guess what, we’ve got our visas for a short-term visit to the UK this winter.
--- How nice! You ______ a different culture then.
A. will be experiencing
B. were experiencing
C. have experienced
D. will have experienced
计算生态系统中进入动物体能流的效率公式是：同化效率=同化的食物能÷______。
