探究“花生果实大小的变异”. (1)实验中,你们是如何取样的______ A、在

题型:解答题

问题:

探究“花生果实大小的变异”.

(1)实验中,你们是如何取样的______

A、在大、小两个花生品种中各自随机取样

B、在大花生果实中挑大的,小花生果实中挑小的

C、在大花生果实中选出大、小两组

D、在小花生果实中选出大、小两组

(2)测量时你们取样品花生每组至少______粒.

(3)探究发现,大花生组果实的平均长度比小花生组果实的平均长度______.

(4)你认为能够遗传的变异是______

A、大花生中果实大小的差异

B、小花生中果实大小的差异

C、大花生果实与小花生果实大小的差异.

考点:探究实验:花生果实大小的变异
题型:解答题

阅读理解。

                                                 British English and American English

     A student is studying British English. He wonders: Can I have a talk with Americans? Can they catch

me? Learners of English often ask--what are the differences between British English and American

English? How important are these differences?

     Certainly, there are some differences between British English and American English. There are a few

differences in grammar(语法). For example, speakers of British English say “in hospital” and “Have

you a pen?” Americans “in the hospital” and “Do you have a pen?” Pronunciation (发音) is sometimes

different. Americans usually sound the “r” in words like “car”and “farm”. Some speakers of British English do not sound the “r” in these words. There are differences between British English and American English in spelling and vocabulary. For example, “colour”and “honour” are British English spellings. “Color” and

"honor” are American English spellings.

     These differences are in grammar, pronunciation, spelling and vocabulary. However, they are not

important. For the most part, British English and American English are the same language.

1. In American English, we can say, "                 ? "

A. Have you a new book

B. Do you have a new book

C. Are you have a new book

D. Can you to have a new book

2. Between British English and American English, sometimes pronunciation is                            .

A. poor

B. different

C. high

D. short

3. In American English, the word “favourite”can be spelt                     .

A. favoruite

B. favurite

C. favorite

D. favrite

4. Englishmen say “in hospital”, while Americans say                         .

A. at the hospital

B. in the hospital

C. by hospital

D. to hospital

5. The main idea of the passage is that                         .

A. there are no differences between British English and American English

B. British English and American English are two different languages

C. speakers of British English and American English speak the same language

D. we shouldn't speak English

题型:解答题

圆域函数Circ(r)常用来表示()的透过率

A、圆孔

B、矩孔

C、方孔

题型:解答题

Ziehl-Neelsen抗酸菌染色将抗酸菌染为()。

A.红色

B.灰蓝色

C.蓝绿色

D.黄色

E.紫色

题型:解答题

以下关于两层C/S结构的数据库应用系统特点说法错误的是______。

A.DBAS的数据管理和数据处理的功能被分解并分布在客户端和数据库服务器上

B.数据库服务器可以为多个客户端应用提供共享的数据管理功能

C.客户端可以通过网络访问多个不同的数据源

D.客户端属于典型的“瘦客户端”

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试述尿潞留的定义及临床表现?

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