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【单选题】
延缓混悬微粒沉降速度最简易可行的措施是A.
降低分散媒的黏度
B.
减小混悬微粒的半径
C.
使微粒与分散媒之间的密度差接近零
D.
加入反絮凝剂
E.
加入表面活性剂
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举一反三
【简答题】一般地起动机与蓄电池间连接导线上每通过100A电流所产生的电压降不超过( )
【单选题】The news is mainly about the EUs meeting to______.
A.
confirm the Euro as their currency
B.
find a solution to debt crisis
C.
collect money for Greece
D.
collect money for Europe's banks
【单选题】某患者食欲不振、乏力一周,血清学检查:HBsAg(+)、抗HBs(-)、 HBeAg(+)、抗HBe(-)、抗HBc IgM(+),肝功能显示ALT升高。提示
A.
急性乙肝
B.
慢性乙肝
C.
乙肝恢复期
D.
急性丙肝
E.
既往乙肝感染
【单选题】The second paragraph is mainly about ______.
A.
the difficulties faced by young people in finding jobs
B.
the gap between scientific and technical professionals and non-professionals
C.
the difficult problems raised by rapid scientific advances
D.
scientific research in the 21st century
【单选题】一般地起动机与蓄电池间连接导线上每通过100A电流所产生的电压降不超过
A.
0.1-0.15V
B.
0.2-0.3V
C.
0.3-0.45V
D.
1.0-1.5V
【简答题】根据句意、汉语提示及首字母完成句子。 1. I put some tea l_____ on the floor. 2. Everyone was very s_____. 3. Lisa showed us some e_____. 4. Jenny often _____ ( 梳) her long hair in the morning. 5. We _____ ( 站立) up, when...
【单选题】This passage is mainly about ______.
A.
the beginnings of oceanography
B.
the laying of the first undersea cable
C.
the investigation of ocean depths
D.
the early intercontinental communications
【单选题】一般地起动机与蓄电池间连接导线上每通过100A电流所产生的电压降不超过
A.
0.1~O.15V
B.
0.2~O.3V
C.
O.3~0.45V
D.
0.5~0.7V
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