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【多选题】
DNA is a linear polymer made up of four different types of monomers. The backbone is built of repeating sugar–phosphate units. What base might be attached to each deoxyribose. ( )
A.
Adenine
B.
cytosine
C.
guanine
D.
thymine
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【多选题】请问以下哪些方法可以检验钞票真伪()
A.
看水印、安全线、看钞票上的图案颜色是否正常
B.
摸钞票人像、盲文点是否有凹凸感
C.
听抖动钞票声响是否清脆
D.
用验钞机或其他仪器检测
【单选题】土壤通气不良使根系吸水量减少的原因是( )
A.
缺乏氧气
B.
水分不足
C.
CO2浓度过高
【多选题】记录独立访客数的一般时间标准:
A.
B.
C.
季度
D.
【单选题】土壤通气不良使根系吸水量减少的原因是( )。
A.
缺乏氧气,根系生长受抑制
B.
水分不足,根系生长受抑制
C.
D.
土壤孔隙小
【多选题】请问以下哪些方法可以检验钞票真伪?( )
A.
一看:看水印、看安全线、看钞票上的图案颜色是否正常
B.
二摸:摸凹凸感
C.
三听:听响声是否清脆
D.
四测:验钞机或其他仪器检测
【单选题】土壤通气不良使根系吸水量减少的原因是 。
A.
缺乏氧气
B.
水分不足
C.
水分太多
D.
二氧化碳浓度过高
【简答题】完形填空。 I devote myself to music because of my grandmother. My mom and I lived with grandparents from the time I was two until I was eight. And even then, I was at their house before and after school ev...
【单选题】My grandmother ( ) in Yangzhou. She was born there and has never lived anywhere else.
A.
lived
B.
lives
C.
was  living
D.
will  live
【简答题】关于S1口数据流的传输,下列说法错误的是:
【简答题】完形填空。 This is Red Star Town. My grandfather has lived here all his life. He 1 my grandmother here and they got married. Red Star Town was called Taping Town before. The government started 2 the wooden...
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