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【单选题】
以下关于确定场地覆盖层厚度的论述中,正确的是A.
当存在剪切波速大于相邻上层土剪切波速2.5倍的土层且其下卧层的剪切波速均不小于400m/s时,可按地面至该土层顶面的距离确定
B.
剪切波速大于500m/s的孤石、透镜体,其厚度应从覆盖土层中扣除
C.
土层中的火山岩硬夹层,应视为刚体,其厚度应从覆盖土层中扣除
D.
一般情况下,可取地面至剪切波速大于500m/s的土层顶面的距离确定
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举一反三
【单选题】It is implied by the author that, because of the kind of teacher education in the US, teachers there tend to ignore ______.
A.
constant development of new teaching approaches
B.
using their own wisdom in problem-solving
C.
talented performances of minority students
D.
community-based literacy enhancement
【单选题】The ____ of writing a lesson plan is one to give proper consideration to what the teacher is going to do in that lesson.
A.
aim
B.
process
C.
principle
D.
method
【简答题】( )问题是关系国计民生的根本性问题,没有农业农村的现代化,就没有国家的现代化。
【单选题】关于细菌耐药性(R)质粒的描述，错误的是( )
A.
由耐药传递因子(RTF)和耐药(r)决定因子组成
B.
RTF和F质粒的功能相似，编码细菌的性菌毛
C.
R质粒的转移是造成细菌间耐药性传播的主要原因
D.
细菌耐药性的产生是由于R质粒发生基因突变所致
E.
R决定因子可编码细菌的多重耐药性
【单选题】关于细菌的耐药性(R)质粒的描述，错误的一项是
A.
由耐药传递因子(RTF)和耐药决定因子(R)组成
B.
RTF和F质粒的功能相似，编码细菌的性菌毛
C.
R质粒的转移是造成细菌间耐药性传播的主要原因
D.
细菌耐药性的产生是由于R质粒基因突变所致
E.
R决定因子可编码细菌的多重耐药性
【简答题】Somebody ought to p_______( 惩罚 )the thief and teach him a lesson.
【单选题】有关耐药性质粒的描述错误的一项是( )
A.
南耐药传递因子(RTF)和耐药决定子组成，RTF和F质粒的功能相似，编码性菌毛
B.
R质粒的转移是细菌间耐药性传播的主要原因
C.
细菌耐药性的产生是由于R质粒基因突变所致
D.
耐药决定因子可编码细菌多重耐药性
E.
可在细菌间转移
【单选题】According to the passage, whose attitude towards Mexico will be influenced by the teacher most easily?
A.
A pupil who has been to Mexico many times.
B.
A pupil who has watched relevant programs about Mexico.
C.
A pupil who has been to Mexico once and read a lot of books about that place.
D.
A pupil who has never been to Mexico and even never heard of that place.
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