胰腺可分泌下列哪些激素()
A.胰岛素
B.生长激素
C.胰高血糖素
D.生长激素释放抑制素
E.胰酶
参考答案:A, C, D
—What were you saying just now?
—________. Let's get down to the English speaking contest tomorrow.[ ]
A. Don't mention it
B. Take it easy
C. That's all right
D. Forget it
编制组段数为10的频数表,在确定组距时()
A.常取最大值的1/10取整作为组距
B.常取最小值的1/10取整作为组距
C.常取极差的1/10取整作为组距
D.组距等于极差
E.常取极差的一半取整作为组距