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【判断题】
维生素C的化学结构式，临床上用其消旋体A.
正确
B.
错误
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举一反三
【单选题】As urban populations exported finished goods in ________ for raw materials from neighboring populations, organized trade grew substantially.
A.
switch
B.
swap
C.
exchange
D.
change
【简答题】日本社会( )现象日益严重,人口成逐年下降趋势,据2018年4月统计,人口数据显示为( )亿,其中接近5成人口集中在( )、( )、( )为中心的三大都市圈。
【判断题】变电一次接线图中间隔及设备图元的排列位置应与现场一致，各设备间的连接应按实际连接用导线相连，但站用变部分接线如果在图形中不方便摆放，可不与站用变相连而单独绘制在空白处，并在进线处进行标注。
A.
正确
B.
错误
【单选题】As urban populations exported finished goods __________ raw materials from neighboring populations, organized trade grew substantially.
A.
in exchange to
B.
in exchange for
C.
in exchange as
【简答题】分放在各处;摆(列)开
【单选题】The drive shaft connects to .
A.
the transmission output; the differential pinion shaft
B.
the cylinder; the clutch
C.
the clutch; the transmission output
【单选题】As urban populations exported finished goods __________ raw material from neighboring populations, organized trade grew substantially.
A.
in line with
B.
in relation to
C.
in exchange for
D.
in favor of
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