补体受体(CR)

题型:名词解释

问题:

补体受体(CR)

考点:医学免疫学医学免疫与微生物学医学免疫与微生物学题库
题型:名词解释

阅读短文,根据短文判断正误,正确的选A.错误的选B。

     Jim's family likes to travel by train, because they think it is cheaper and more enjoyable than a trip by air.

Last week they took a train to Chengdu before they went on to Mount Emei by bus. At the very lively station,

Mrs. Green bought some food, fruit and drinks. The train was quite comfortable because there weren't too

many people on it. They kept watching the beautiful scenery out of the window. The conductor kept coming

to offer them hot water and magazines. Jim and his sister, Kate, played cards with people nearby. A young

man practiced speaking English with Mr. Green. Although it was a long journey, none of them felt tired.

( )1.Jim's family likes to take trains to travel around.

( )2.They went to Chengdu by air last week.

( )3.Mr. Green bought some food, drinks and newspapers on the train.

( )4.The train was uncrowded.

( )5.A young man practiced speaking English with Mrs. Green.

题型:名词解释

()EDTA与金属离子的配合物有如下特点。

A、EDTA具有广泛的配位性能,几乎能与所有金属离子形成配合物

B、EDTA配合物配位比简单,多数情况下都形成1:1配合物

C、EDTA配合物难溶于水,使配位反应较迅速

D、EDTA配合物稳定性高,能与金属离子形成具有多个五元环结构的螯合物

题型:名词解释

安装DN≥()的调节阀,要在其前后管道上加永久性支架。

A、40mm

B、50mm

C、30mm

D、20mm

题型:名词解释

粳稻发芽的最适温度()℃。

A、16~20

B、20~24

C、24~28

D、28~32

题型:名词解释

价高者得规则分别约束()。

A.竞买人

B.拍卖人

C.委托人

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