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问题 选择题

某同学在进行组织培养过程中发现有部分组织块死亡，下列对造成该结果的原因分析中不合理的是[ ]

A．培养基未消毒灭菌

B．未置于二氧化碳培养箱中培养

C．培养基营养过多

D．取材部位不对

答案

答案：B

单项选择题

由于船舶装载后的t、dF和dA均与（）有关，因此，可计算出相应状态时的t、dF和dA值，以排水量和载荷纵向重量力矩为坐标，绘出t、dF和dA等值线，从而构成吃水差曲线图。

A．装载排水量

B．各载荷纵向重量力矩

C．重心高度

D．A和B
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阅读理解

On the River Thames there are a number of boat races every year and these have become very popular with the public. Perhaps the best–known of these races is the University Boat Race. This takes place just before Easter every year and is a competition between teams from the Universities of Oxford and Cambridge. They row from Putney to Mertlake, a distance of about four and a quarter miles. This race has been taking place almost every year since 1829.

小题1: The best – known of these races is __________.

A．the Boat Race of the University of Oxford.

B．the Boat Race of the University of Cambridge

C．the Boat Race of the Olympic Games

D．the University Boat Race小题2: Generally, the Boat Race takes place _________.

A．once a year

B．twice a year

C．every three years

D．every other year小题3: The words “Putney” and “Mertlake” are _________.

A．names of places

B．names of teams

C．names of boat races

D．names of universities
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