活性炭是最常用的吸附能力很强的非极性吸附剂,下列有关其说法错误的是()。A.活性炭对

题型:单项选择题

问题:

活性炭是最常用的吸附能力很强的非极性吸附剂,下列有关其说法错误的是()。

A.活性炭对带有极性基团的化合物的吸附力最大

B.活性炭对分子量大的化合物的吸附力大于分子量小的

C.活性炭对芳香族化合物的吸附力大于脂肪族化合物

D.活性炭在碱性溶液中的吸附力较强

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题型:单项选择题
已知x=
5
+2
,求x2-x+
5
的值.
题型:单项选择题

---What’s your best friend like?   ---              .

A.He is fine. Thank you.

B.He is a doctor.

C.He likes watching TV.

D.He is helpful and generous.

题型:单项选择题

Rented Boyfriends

Taobao. com, China's largest online marketplace, is never short of bizarre offers.

And here is the latest one: boyfriends for rent.

A rented boyfriend can do the following: accompanying the girl to visit friends and families, go shopping, having meals and even getting a kiss out of courtesy. The charge is by the hour.

The services become hot with the approach of the Spring Festival, the most important festival for family reunions.

In China, parents especially worry about unmarried daughters.

Single women will have to face the same old question at the family dinner table: have you got a boyfriend?

And for those who haven't found their Mr. Rights, renting a boyfriend emerges as a solution.

So, which men are willing to offer that service?

“I offer such a service only because I'm bored and know fewer female friends at work," said Ding Hui, 27, a salesman in the plastic industry in Shanghai, with a monthly salary of more than 10,000 yuan.

He rented himself twice last year: during the Spring Festival and National Day. His customers were two 28-year-old women.

He charged 3,000 yuan each, and the customer had to cover his round-trip tickets, accommodations and bought him clothes to make him look smart.

More than 260 rent-a-boyfriend services can be found on the taobao.com, with the number climbing.

An anonymous female netizen, who claimed to have rented a boyfriend, said on the website, "My parents are very satisfied, so my pressure is greatly reduced."

Another comment read, "It's good that I've achieved the wish of my parents."

小题1:On which site can women rent boyfriends?  (within 4 words )

                                                                                   

小题2:How does a rented boyfriend get paid? (within 3 words)

                                                                                  

小题3:What question may single women have to face at the family dinner table? (within 5 words)

                                                                                   

小题4:What did Ding Hui’s customer have to pay besides his service?(within 18 words )

                                                                                   

小题5:For what reasons do single women rent boyfriends? ( within 15 words)

                                                                                   

题型:单项选择题

下列过程不能引起基因重组的是()

A.减数分裂时,同源染色体的非姐妹染色单体之间发生交换

B.减数分裂时,非同源染色体的自由组合

C.受精过程中,精子和卵细胞的结合

D.肺炎双球菌转化实验中,R型肺炎双球菌转化为S型肺炎双球菌

题型:单项选择题

具有补肾助阳、润肠通便功效的药物是()

A.山药

B.白术

C.当归

D.甘草

E.锁阳

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