不定积分求解,

According to the report, which statement is NOT mentioned？

A．The benchmarks could be as high as 18,500 yuan per month in Hong Kong.

B．The Chinese Academy of Social Science also released its findings in 2006.

C．The benchmarks at the upper end are 8,900 yuan in Macao and 5,350 yuan in Shanghai.

D．At the lower end are 1,300 yuan in Nanning and 1,100 yuan in Yinchuan and Xi"ning.

请帮忙给出正确答案和分析，谢谢！

On which holiday pumpkins are a very important part of celebration？

A．Halloween.

B．Thanksgiving.

C．Christmas.

D．New Year.

请帮忙给出正确答案和分析，谢谢！

David Hu and his colleagues analyzed the frozen ant rafts with______.

A．a small robot

B．a video camera

C．advanced materials

D．a CT scanner

请帮忙给出正确答案和分析，谢谢！

A PIN is necessary for______.

A．the activation of your credit card

B．online shopping with a credit card

C．your using credit card in shops

D．withdrawing cash through a credit card

请帮忙给出正确答案和分析，谢谢！

How should people deal with emails asking for their credit card information？

A．They should call the banks to confirm.

B．They should delete them right away.

C．They should check who sent out the emails.

D．They should respond to the emails with care.

请帮忙给出正确答案和分析，谢谢！