小敏编写了一个VB程序，用来求一个偶数(6到100之间)可能存在多少这样的素数对（注： A+B与B+A认为是相同素数对，不重复统计），并把这些结果输出到一个列表框中，通过逻辑推理，小敏发现这些素数对都是奇数，所以她只需要验证奇数的素数对即可。运行界面如图所示，程序代码如下。但加框处代码有错，请改正。

Dim IsPrime(100) As Boolean  '用来存储是否素数，True为素数，False为非素数

Private Sub Command1_Click()

    Dim x As Integer, y As Integer, i As Integer, num As Integer

Call Init  '调用Init函数

    x = Val(Text1.Text)

y = x \ 2

num = 0

For i = 3 To y Step 2

                 '①

num = num + 1

            List1.AddItem Str(x) + "=" + Str(i) + "+" + Str(x - i)

        End If

    Next i

    Label2.Caption = "偶数" + Str(x) + "共有" + Str(num) + "个素数对。"

End Sub

Sub Init() '初始化IsPrime数组的值

    Dim i As Integer, j As Integer, x As Integer

    For i = 3 To 100 Step 2

        x = Int(Sqr(i))

                            '②

            If i Mod j = 0 Then Exit For

        Next j

        If j > x Then IsPrime(i) = True Else IsPrime(i) = False

    Next i

End Sub

①____ ②____ 

北京农业在借鉴全国农业发展成功经验的基础上，结合自身实际，依靠大城市辐射，大力发展生态、观光和休闲农业，从而走在全国前列。从哲学上看，这说明（   ）。

阅读下面短文，掌握其大意，然后从每题所给的A、B、C、D四个选项中选出最佳选项。

    My six-year-old daughter, Cindy, and I stopped at a food shop for some bread. As we were going out of the door, a young teenage boy was coming in.

    The boy had a strange hairstyle. His nose was pierced, and a ring ran 1 the hole. He held a skateboard under one arm and a2 under the other.

    Cindy, who was walking ahead of me, suddenly 3 when she saw the boy. I thought he had frightened my daughter. But I was 4. My daughter backed up against the door and opened it as wide as it would go. Now I came face to face with the young man. I 5 aside (到一边) and let him pass. He replied vey 6, “Thank you very much.”

    On our way to the car, I praised Cindy for holding open the door for the boy. It seemed that she was not troubled by the boy's appearance,7 I still wanted to make sure. I wanted to be ready to talk about the young man 8 was so different from others.     I prepared to tell my little daughter what 9should be like.   

    But as it turned out, the person who needed the talk was 10!

    The only thing Cindy noticed about the boy was the fact that his arms were 11. “ He held a skateboard under one arm and a basketball under the other. He would have a 12 time to open the door,” said Cindy.

    I just 13  the hairstyle, the piercing and the ring, while she saw a person carrying something under arms and heading towards a(an)14 door.

    What my daughter said 15 me that I should change my ways of judging people and learn from my daughter to be open-minded and warm-hearted.

按照玻尔理论，一个氢原子中的电子从半径为r_a的圆周轨道上自发地直接跃迁到一个半径为r_b的圆周轨道上，r_a＞r_b，在此过程中（    ）

2017年4月3日，某极限运动俱乐部在我国某地 (24°N，104°E)开展绳降比赛，9点30分比赛开始。下图示意该地附近等高线分布状况。读图完成下列各题。