题目内容（请给出正确答案）

[单选题]

⽤Dim S (20) As Integer语句定义的数组的元素个数是()。

A.19

B.20

C.21

D.22

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更多“⽤Dim S (20) As Integer语句定义的数组的…”相关的问题

第1题

如果对于刚才的程序进行改造，使变量i的数值存储到数组中，则此程序运行结果会：Dim s（1 to 10） as longFor i = 1 To 10 Step 4s（i） = iNext i（）

A.只有下标为1、5、9的数组项被赋到值1、5、9

B.数组前三项值为1、5、9

C.只有下标为1、5、9的数组项被赋到值1、2、3

D.程序运行会出错

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第2题

用二分法求函数f（x)=x^3-6x-1=0在x=2～5范围内的x=2附近的一个实根，其计算误差为|xl-x2|<10^（-6

用二分法求函数f（x)=x^3-6x-1=0在x=2～5范围内的x=2附近的一个实根，其计算误差为|xl-x2|＜10^（-6

用二分法求函数f(x)=x^3-6x-1=0在x=2～5范围内的x=2附近的一个实根，其计算误差为|xl-x2|＜10^(-6)。完善下列程序。

Private Sub Command1 _Click ()

Dim V0 As Singke, v As Single, s As String

Dim x As Single, t As Single, x1 As Single, x2 As Single

x1 =0: x2=5

Do While()

x = (x1 +x2)/2

If Sgn(f1 (x)) = 1 Then

x2 = x

Else

x1 = x

End If

Loop

Print "x = "; x

End Sub

Private Function f1 (x As Single) As Single

f1 = x * x * x -6 * x-1

End Function

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第3题

Did you ever have someone's name on the tip of your tongue and yet you were unable to reca

ll it？ (21) this happens again, do not try to recall it. Do something (22) for a couple of minutes, and the name may come into your head. The name is there. Since you have met (23) person and learned his name. It only has to be dug out. The initial effort to recall (24) the mind for operation, but it is the subconscious (25) that go to work to dig up a dim memory. Forcing yourself to recall almost never helps because it doesn't loosen your memory; it only tightens it. Students find the preparatory method helpful (26) examinations. They read over the questions (27) trying to answer any of them. Then they answer first the ones (28) which they are most confident. Meanwhile, deeper mental activities in the subconscious mind are taking (29) ; work is being done on the more difficult question. By the time the easier questions are answered, answers to the more difficult ones will usually begin to (30) into consciousness. It is often just a question of waiting for recall to come to the memory.

21.

A. Whether

B. When

C. While

D. As

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第4题

It's 20℃.It’s__（）

A.hot

B.ool

C.warm

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第5题

Looking back on my childhood, I am convinced that naturalists are horn and not made. Altho

ugh we were brought up in the same way, my brothers and sisters soon abandoned their pressed flowers and insects. Unlike them, I had no ear for music and languages. I was not an early reader and I could not do mental arithmetic.

Before World War I we spent our summer holidays in Hungary. I have only the dim memory of the house we lived in, of my room and my toys. Nor do I recall clearly the large family of grandparents, aunts, uncles and cousins who gathered next door. But I do have a crystalclear memory of the dogs, the farm animals, the local birds, and above all, the insects.

I am a naturalist, not a scientist. I have a strong love of the natural world and my enthusiasm had led me into varied investigations. I love discussing my favorite topics and enjoy burning the midnight oil while reading about other people's observations and discoveries. Then something happens that brings these observations together in my conscious mind. Suddenly you fancy you see the answer to the riddle, because it all seems to fit together. This has resulted in my publishing 300 papers, and books, which some might honour with the title of scientific research.

But curiosity, a keen eye, a good memory and enjoyment of the animal and plant world do not make a scientist: one the outstanding and essential qualities required is se]f-discipline, a quality I lack. A scientist requires not only self-discipline but hard training, determination and a goal. A scientist, up to a point, can be made. A naturalist is born. If you can combine the two, you get the best of both worlds.

The first paragraph tells us the author ______. ()

A．was interested in flowers and insects in his childhood

B．lost his hearing when he was a child

C．didn't like his brothers and sisters

D．was born to a naturalist's family

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第6题

甲地的经纬度是（）

A.40°E，20°S

B.40°E，40°N

C.40°W，20°N

D.20°W，40°S