消费者在展销会、租赁柜台购买商品或者接受服务，其合法权益受到损害时，不能向( )要

阅读理解。

    Can we live without salt? No, salt is very important to us, we need salt in our food. Animals need it, too.

Most of the salt in our country comes from the sea. People dig very big pools and let sea water in. When

the sun dries up the water, people can get salt from the ground. The salt is white, clean and beautiful.

    There are a lot of salt wells (井) in Sichuan. A salt well in much like a water well. People bring the well

water up to the ground and then dry it in big jars over fire. In this way, they get salt.

    We can also get salt from salt mines (矿). A salt mine may be found under the ground. Some years ago,

people in Jiangxi found a big salt mine and soon opened it. People there don't need salt from other places

any more.

    In the northwest of our country, there are many salt lakes. Some of these lakes are very big. The salt

even in one big lake will be enough for our people for centuries.

1. We can't live without salt, so           . [ ]

A. we need it, too

B. it is very important to us

C. animals need it, too

D. there is salt in all our food

2. We get most of the salt from           . [ ]

A. salt lakes

B. sea water

C. salt wells

D. salt mines

3. Not long ago, a big salt mine was found and opened           . [ ]

A. in Sichuan

B. in Jiangxi

C. in the northwest

D. beside these

4. The best title for this article is           . [ ]

A. Salt

B. Why We Need Salt

C. Salt Is Important

D. We Need Salt

关于造血干细胞的叙述中，错误的是(　　)。

A．造血干细胞移植能够治疗缺铁性贫血

B．造血干细胞能够分化为红细胞、白细胞和血小板

C．造血干细胞是具有分裂和分化能力的细胞

D．人的骨髓和脐带血中有造血干细胞

已知等差数列{a_n}的第二项为8，前10项和为185．

（1）求数列{a_n}的通项公式；

（2）若从数列{a_n}中，依次取出第2项，第4项，第8项，…，第2ⁿ项，…，按原来顺序组成一个{b_n}数列，试求数列{b_n}的通项公式和前n项的和．

下列哪项检测有助于判断痴呆的严重程度？（）

A.MMSE

B.BBS

C.WEBSTER

D.CDR

E.HIS

以下因素对病毒影响不正确的有

A．对氧化剂敏感

B．耐热不耐冷

C．高压可使病毒灭活

D．电离辐射可使病毒灭活

E．紫外线可使病毒灭活