抗体的纯度鉴定选择何种物质作为凝胶电泳支持物() A.琼脂糖 B.琼脂糖珠4B C.

题型:单项选择题 B1型题

问题:

抗体的纯度鉴定选择何种物质作为凝胶电泳支持物()

A.琼脂糖

B.琼脂糖珠4B

C.聚乙二醇

D.硫酸铵

E.聚丙烯酰胺

考点:临床医学检验技术(主管技师)沉淀反应沉淀反应题库
题型:单项选择题 B1型题

简述小麦的倒伏类型及防止倒伏的措施。

题型:单项选择题 B1型题

甲公司为企业的发展制定了一个目标,为此需要对公司的战略环境进行分析,其中在对内部因素进行分析时,需要考虑的内容包括( )。

A.组织资源

B.研发能力

C.企业核心竞争力

D.有形资源

题型:单项选择题 B1型题

下列各组句子中,划线词语的用法与例句相同的一项是

例:始大人常以臣无赖,不能治产业,不如仲

A.秦王子婴素车白马,系颈以组,封皇帝玺符节,降轵道旁。

B.侯生乃人间语

C.读《服鸟赋》,同生,轻去就,又爽然自失矣。

D.夫秦失其政,陈涉首难,豪杰起,想与并争,不可胜数。

题型:单项选择题 B1型题

阅读理解。

     There are many wetlands (湿地) in China and some of them have become the world's important wetlands.

The Chinese Yellow Sea Wetlands are among them. They are in Yaneheng, Jiangsu Province. They are home

for many different kinds of birds and animals. The world's largest Milu Deer Nature Reserve (自然保护区) is

in them. More than 700 milu deer live freely there. There are not many red-crowned cranes (鹤) in the world,

but every winter you can see some in the Red-crowned Cranes Nature Reserve in the Yellow Sea Wetlands.

     The temperature in the wetlands is usually neither too high nor too low. There is a lot of rain and sunshine,

too. They are really good places for wildlife. Offering food and home for some special kinds of animals and

birds is not the only reason why we need to protect wetlands. Wetlands are important because they also prevent

flood. But some people want to change the wetlands to make more space for farms and buildings. This means

there will be less and less space for wildlife.

     Luckily, more and more people are beginning to realize the importance of wetlands and wildlife. Every year,

on February 2nd, many activities are held to tell people more about wetlands.

1. From the first paragraph, we learn many kinds of birds and animals prefer to live in the _____.

A. houses

B. waters

C. deserts

D. wetlands

2. Usually the weather in the wetlands is _____.

A. hot

B. pleasant

C. cold

D. dry

3. One of the reasons why we must protect wetlands is that _____.

A. they can prevent flood

B. there are many houses

C. they will grow larger and larger

D. there is much rain and sunshine

4. Fortunately, more and more people begin to _____.

A. make more space for farms

B. build many kinds of houses

C. hold activities to catch animals

D. know the meaning of protecting wetlands

5. What's the best title for this passage?

A. Special Animals in China

B. How to Protect Wetlands

C. Wetlands-Home for Wildlife

D. Chinese Yellow Sea Wetlands

题型:单项选择题 B1型题

以下关于材料脆性的说法,正确的是()

A、脆性材料抵抗冲击荷载或振动作用的能力较好

B、脆性材料抵抗冲击荷载或振动作用的能力较差

C、脆性材料的抗压强度一般比抗拉强度高

D、脆性材料的抗压强度一般比抗拉强度低

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