化简求值:a2-1a2-2a+1+2a-a2a-2÷a,其中a=2+1.

题型:解答题

问题:

化简求值:
a2-1
a2-2a+1
+
2a-a2
a-2
÷a
,其中a=
2
+1
考点:分式的加减乘除混合运算及分式的化简最简二次根式
题型:解答题

I love soccer. It’s a team game. I don’t just like to watch it. I like to play it, too. I play on a team, but it’s not my school team. All the team members(成员) are from our neighborhood(邻里). We train together on Tuesday and Friday afternoon. We are quite a good team. We win most games. We only lost or draw(平局) a few (for example, last Sunday the score was 2:2). Next Saturday there will be a game between our team and Sun Garden team. The Sun Garden team is a very good team. I’m sure it will be a wonderful game.

根据短文内容,判断下列句子是否正确,对的涂(A),错的涂(B)。(10分)

小题1:The writer plays on his school soccer team.

小题2:The writer trains with the team members twice a week..

小题3:There is a game between the writer’s team and other team teams every week.

小题4:The writer’s team never loses any games..

小题5:The writer’s team will play against Sun Garden team.

题型:解答题

下列不属于价格合理化途径选项的是( )。

A.合理的价格体系主要是在公平竞争条件下形成
B.政府监管价格是对市场机制的弥补和矫正
C.政府对价格的管制是解决自然垄断、公共物品、信息不对称等问题
D.人为垄断是价格合理化的一种方式

题型:解答题

田某因涉嫌诈骗罪先被公安机关刑事拘留,经检察院批准逮捕,后变更为监视居住,但田某实际被限制在一小房间内。一审法院审理判处田某有期徒刑5年,第二审法院则改判无罪,田某提出国家赔偿请求。下列说法不正确的有:()

A.田某无权要求国家对他被监视居住承担赔偿责任

B.对逮捕的赔偿,公安机关为赔偿义务机关

C.对被判处有期徒刑5年,田某无权要求国家赔偿

D.田某只能要求金钱赔偿

题型:解答题

溶解氧表示的是溶解于水中()氧的数量。

A.液态

B.离子态

C.原子态

D.分子态

题型:解答题

比较强心苷类药物对正常心脏和衰竭心脏在心肌收缩力、心排血量、心率、心肌耗氧量方面作用的异同点。

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