关于类毒素正确的是() A.有免疫原性,无毒性 B.没有免疫原性,有毒性 C.其性质

题型:单项选择题

问题:

关于类毒素正确的是()

A.有免疫原性,无毒性

B.没有免疫原性,有毒性

C.其性质很不稳定

D.没有免疫原性也没有毒性

E.能中和毒素的毒性

考点:上海住院医师小儿外科病理科病理科题库
题型:单项选择题

阅读理解。

    A plant makes its own food in its leaves. Water comes to the leaves through the roots ( ). Air gets into

the leaves through very small holes. The green coloring ( ) in the leaves uses the water and air to make the

food for the plant. It also needs sunshine because a plant can make food only when the sun is shining. Animals

and people could not live without green plants. They both eat plants. People and some animals also eat the meat

of some animals and these animals eat plants.

1. A plant gets food from           . [ ]

A. the sun

B. the air

C. its roots

D. its leaves

2. What things can make the food for a plant? [ ]

A. Sunshine, water, air and the roots.

B. Water, air, meat and green coloring.

C. Air, sunshine, water and green coloring.

D. Water, sunshine, animals and green coloring.

3. A. plant has very small holes in its leaves           . [ ]

A. for water to come in

B. for air to come in

C. for sunshine to come in

D. for green coloring to come in

4. A plant can make its food when it is            . [ ]

A. sunny

B. rainy

C. cloudy

D. windy

5. From the text we know            . [ ]

A. people can't get food without animals.

B. people can't get plants without animals.

C. people can't get animals with out meat.

D. people can't get food without plants.

题型:单项选择题

《中华人民共和国行政强制法》中规定,因查封、扣押发生的费用由()承担。

题型:单项选择题

违反《工会法》规定,阻挠职工依法()工会或者阻挠上级工会()职工筹建工会的,由劳动行政部门责令其改正;拒不改正的,由劳动行政部门提请县级以上人民政府处理。

题型:单项选择题

以下是与高中生物实验有关的内容。

在完成了环境污染对河流中生物影响的调查后,应写出调查报告,内容应包括()等(至少回答两项)。

题型:单项选择题

含量测定可分为

采用生物学方法或酶化学方法


A.含量测定 B.效价测定

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