同学们站成方队进行军训。只知道最外层每边站了12人。最外层一共有多少名同学？正确的算式是[ ]
A.12×4-4
B.12×4+4
C.12×4
答案：A
—How many years has life been on earth?
— years, I think.[ ]
A. 5 millions
B. 5 millions of
C. Million of
D. Millions of
冷藏工艺条件有哪些？如何影响冷藏加工的？
