下列职务属于不相容职务的是( )。 A．交易的授权与检查 B．资产保管与资产的会计

书面表达。

请以Tom的身份给Jenny写一封回信，描述你自己的房间，文字不少于50词。

Hello,

    This is a picture of my room. There's a bed, of course, and there are two pictures of movie stars above

the bed.

    There's a bookcase next to the bed. There are lots of books on it. There is a radio under the bookcase,

and there are also some CDs.

     There is a dresser in the other corner. There is a table and a chair under the window, between the dresser

and the bookcase. I do my homework and write letters, too. There is a computer on the table. There is a

lamp on the table, too.

     The room is not perfect. There isn't a TV and there isn't a telephone! Tell me about your room. Is it big?

                                                                                                                                                  Love, 

                                                                                                                                                  Jenny

关于皮肤弹性的叙述，下列哪项是错误的（）

A.儿童与青年皮肤紧张富有弹性

B.中年以后皮肤弹性减退

C.长期消耗性疾病，皮肤弹性减退

D.严重脱水病人，皮肤弹性减退

E.发热时皮肤弹性减退

设随机变量X～t(n)(n＞1)，Y=

则______．

《资治通鉴》成书于( )。

A．西汉
B．东汉
C．北宋
D．南宋

燃气引燃流程中有（）减压阀。

（A）1个

（B）2个

（C）3个

（D）4个