有关理想质粒载体的特点，正确的是（） A.为线性单链DNA B.含有多种限制酶的单一

An artist went to a beautiful part of the country for a holiday, and stayed with a farmer. Every day he went out with his paints and brushes and painted from morning to evening, and then when it got dark, he went back to the farm and had a good dinner before he went to bed.

At the end of his holiday he wanted to pay the farmer, but the farmer said, “No, I don’t want money… but give me one of your pictures. What is money? In a week it will all be finished, but your painting will still be here.”

The artist was very pleased and thanked the farmer for saying such kind things about his pictures. The farmer smiled and answered, “It’s not that. I have a son in London. He wants to become an artist. When he comes home next month, I’ll show him your picture, and he will not want to be an artist any more, I think. ”

小题1:__________ people are mentioned (提到) in the article.

A．Two

B．Three

C．One

D．Many小题2:The artist lived with the farmer __________.

A．for about a month

B．for a year

C．for a holiday

D．for the farmer’s son小题3:The farmer asked the artist to give him a picture because __________.

A．he liked his picture

B．he didn’t want his money

C．he wanted to sell his pictures for some money

D．he wanted to show it to his son小题4:The artist was very pleased and thanked the farmer because __________.

A．the farmer didn’t want him to pay him

B．the farmer decided to let his son learn from him

C．the farmer’s son would be an artist like him

D．he thought the farmer praised (表扬) him for his pictures

某厂商为增值税一般纳税人，该厂商于 2004年12月将自产产品分别以30元、29元、15元的单价出售给甲、乙、丙三个企业，数量分别为800件、1200件、1000件，其中销售给丙企业的单价为15元的产品被税务机关认定为不合理的偏低价格。当月该厂商在进行增值税销项税额计算时，其应税销售额按规定应该是( )。

A．74000元

B．88200元

C．90000元

D．88500元

下列语句不能够用于打开C根目录下文件test．txt的语句是（ ）。

A．3

B．6

C．10

D．20

覆盖地表而有____生活在一起的的____叫植被。我国的植被主要有___________、_______________、________、___________、___________、____。

参加资格考试的合格考试人员，可以取得报检员资格证书。报检员资格证书有效期为3年。( )