【简答题】A.One or three quarter million more than five years ago. B.One or three quarter million more than one year ago. C.One or three quarter million fewer than five years ago. D.One or three quarter million...
【单选题】2006年6月,科学家完成了“人类基因组”,发现人类基因数目为2.5万~3.5万个。下列有关基因的叙述,不正确的是 [ ]
D.
在生物传种接代过程中,传下去的是控制性状的基因而不是性状
【单选题】. --- It’s said that there are more than 1 million citizens in the county. ---Exactly. One reason is that people are____into it in great numbers.
【单选题】With a total of 1,300 million people, China is one of the most densely ______ countries in the world.
【单选题】下列叙述正确的是( )
A.
pH=3和pH=4的盐酸各10mL混合,所得溶液的pH=3.5
B.
溶液中[H+]越大,pH值也越大,溶液的酸性就越强
C.
液氯虽然不导电,但溶解于水后导电情况良好,因此,液氯也是强电解质
D.
当温度不变时,在纯水中加入强碱溶液不会影响水的离子积常数
【简答题】Extract one (Jo):__________
【单选题】设计一个背单词的程序,选择哪个容器最佳:
【单选题】The hijackers had demanded
A.
over one million dollars and a helicopter.
B.
over one million dollars to help drug-addicts.
C.
over a million dollars' worth of drug.
D.
over one million dollars to buy a helicopter.