5-羟色胺转运体S/S基因型个体遭受应激后较易发生抑郁症说明 A．改变导致疾病发生的

读短文，判断对(√)错(×)。

      It was Saturday. Tom stayed at home. His parents went to visit his grandparents in another city. Tom did his

homework and read books. After lunch, he watched TV and played basketball with Jack. He felt very tired. In

the evening, his parents came back and brought him some presents. They were a schoolbag and a basketball.

Tom felt very excited!

( ) 1. Tom didn't visit his grandparents.

( ) 2. Tom read books in the afternoon.

( ) 3. Tom felt tired after reading books.

( ) 4. Tom's parents bought a new schoolbag for him.

( ) 5. Tom was happy in the evening.

上海世博会上，100辆燃料电池观光车活跃在世博园区，它们靠氢气和氧气反应提供能量．由于它们“喝”的是氢气，产生的是水，真正实现了“零排放”．（化学方程式：2H₂+O₂

若燃烧1kg氢气，需氧气多少千克？______．

下列有关仲裁协议的表述，正确的是( )。

A．合同当事人均受仲裁协议的约束

B．是仲裁机构对纠纷进行的补充条件

C．不排除法院对纠纷的管辖权

D．仲裁裁决具有强制性

E．仲裁机构应按仲裁协议进行仲裁

The trick to marketing is to find out your customers and take steps to ______ their needs.[ ]

A. have  

B. give

C. feel

D. meet

正常骨髓片上相对不容易见到的成熟细胞为（）

A.白细胞

B.巨核细胞

C.血小板

D.红细胞

E.浆细胞