将燕麦幼苗的胚根及芽末端4mm切去,再将剩余的10mm的胚根及胚芽每10条一组分别放

题型:填空题 案例分析题

问题:

将燕麦幼苗的胚根及芽末端4mm切去,再将剩余的10mm的胚根及胚芽每10条一组分别放入保持在25℃的不同浓度的生长素溶液中2d,下表显示实验结果

此实验的实验目的是研究()。

考点:高中生物植物激素调节植物激素调节题库
题型:填空题 案例分析题

Paris is a very beautiful city but l will not call it the most romantic(最浪漫的)city at all! It is difficult to find a hotel(旅馆)!That is quite funny(滑稽).Some policemen help us and then we find a hotel! The hotel is on the sixth floor and it is tired to climb up the stairs(爬楼)!The room is very simple(普通的)but it has a big bathroom.We go out for a walk to visit the city. The Louvre Museum is our favourite one. There are some wonderful pieces of art there. The Eiffel Tower looks so cool from a far place, but when we get close to it, it doesn't look so good. We also don't feel well about the expensive food. Most of the time, we enjoy Paris, but the weather is not always good. It often rains. We feel a little difficult because not many people can speak English and we can't speak French. But I'm still(仍然)glad that this is the beginning of our travel.

小题1:Who help the writer find a hotel?

A.Some students.

B.Some policemen.

C.Some workers.

D.Some farmers.小题2:There is a big_______ in the room of the hotel.

A.bedroom

B.sitting room

C.bathroom

D.kitchen小题3:How does the Eiffel Tower look from a far place?

A.Cool.

B.Short.

C.Pretty.

D.Bad.小题4:What can we know from the passage?

A.The writer doesn't go to the Louvre Museum.

B.The writer can speak English and French.

C.It never rains when the writer stays in Paris.

D.The writer thinks food is not cheap in Paris.小题5:The passage mainly(主要)tells us_______.

A.Paris is not a good place to travel

B.the writer is looking for a good hotel

C.the writer starts travelling from Paris

D.it is important for people to speak French

题型:填空题 案例分析题

扩张型心肌病的二维超声主要表现为()。

A.室壁增厚率增大

B.心室扩大,心房变小

C.室壁弥漫性增厚,室壁收缩运动幅度增大

D.左心或全心扩大,室壁收缩运动幅度普遍减低

E.左心室正常,左心房增大

题型:填空题 案例分析题

学习筑巢在鸟类成功繁殖的过程中扮演着重要角色。斯诺博士近几年中所记录下的画眉鸟的生育过程表明,第一次筑巢的鸟成功的概率大大小于其他较老的同类,也小于自己以后的筑巢。同大多数其他鸟类一样,画眉鸟完全长成后才离开母巢。所以,我们很难回避这样的结论:它们的成功繁殖得益于它们从长辈那里学到的筑巢经验。
如果以下哪项为真,最能构成对上述论证的质疑?()

A.画眉鸟的筑巢能力强于其他的鸟类。

B.画眉鸟在最初几年的试验性繁殖过程中产下可孵化的蛋的能力逐渐增强。

C.第二次筑巢的鸟类生育能力成功的概率比第一次筑巢的大。

D.较弱小的鸟类也能和比它们强壮的鸟类一样成功地生育。

E.大约20%的鸟类在第一次筑巢前就被它们的猎食者杀害。

题型:填空题 案例分析题

某批钢材性能合格,但因生产线太忙无法进行尺寸和表面检验,如用户急需()。

A、可例外放行

B、不允许例外放行

C、让步接收

题型:填空题 案例分析题

卵巢癌诊断的最佳肿瘤标志物是()。

A.CA19-9

B.CA125

C.CA50

D.CAD-3

E.CEA

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