关于选择类工具的说法，不正确的是？（）A、使用选择工具无法编辑路径上的锚点和线段 B

导致北宋中期财政危机的根源是 （  ）

A．辽夏经常攻宋

B．宋太祖加强中央集权的措施

C．土地兼并严重

D．财政入不敷出

在下列图像数据文件格式中，数码相机拍摄的数字图像一般以( )文件格式存储。

A．BMP

B．GIF

C．JPG

D．PCX

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop".

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) . She had only one small, flat bag with a few candies—fiftycent candies! I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

9（）

A.day 

B.chance 

C.cheque 

D.tree

假设检验中的可信度说明()

A．拒绝事实上成立的H₀的概率

B．不拒绝事实上成立的H₀的概率

C．拒绝事实上不成立的H₀的概率

D．不拒绝事实上不成立的H₀的概率

E．以上都不正确

)