若要选定目标的个数，通常选择函数（）来实现。A、Sum B、Avg _爱下问搜题

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问题单项选择题

若要选定目标的个数，通常选择函数（）来实现。

A、Sum

B、Avg

C、Count

D、Var

答案

参考答案：C

补全对话，情景问答

为下列句子选择正确的答语。

( ) 1. Does she have a radio?
( ) 2. Good morning.
( ) 3. Do you want anything?
( ) 4. Why do you want a pen?
( ) 5. Whose ruler is it?

A. Because (因为) want to write a letter.
B. Good morning.
C. It's my ruler.
D. No, she doesn't.
E. I want a book.

选择题

下列物质的用途与化学性质有关的是

A．用生铁制铁锅

B．氧气供给呼吸

C．用木炭除去鞋柜、冰箱内的异味

D．用16%的食盐水来选种