【单选题】19世纪初期的空想社会主义,是空想社会主义发展到顶峰时期,法国的圣西门、傅立叶和英国的欧文为代表的空想社会主义者提出的空想社会主义理论,其“空想”性不包括()
【简答题】If there is only an expiry date in the L/C without a shipment date,the expiry date is regarded as the latest shipment date.( )
【单选题】A drug that inhibits DNA replication, but is inactivated by chromosomes containing telomeres, would prove to be a very useful antibiotic. Telomeres can be best described by which one of the following?
A.
Telomeres are only present in circular chromosomes.
B.
Before telomerase action, and after DNA replication, there is a 3 ′ overhang of the newly synthesized strand.
C.
Before telomerase action, and after DNA replication, there is a 5 ′ overhang of the strand being replicated.
D.
In human DNA, telomeres consist of repeating sequences of TTAGGT.
【判断题】两回转体的轴线都平行于投影面,则两个椭圆在该投影面上的投影为相交二直线。
【判断题】Without telomeres, linear eukaryotic chromosomes would get shorter and shorter with each round of DNA replication.
【简答题】we【L18】______if we urge changes in national policy without