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【单选题】
China is growing stronger and stronger, Chinese is taught in more and more countries. [ ]A.
If
B.
Unless
C.
As
D.
Although
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举一反三
【单选题】以R134a代替过去常用的氟利昂作制冷剂,以下说法不对的是_____。
A.
不能用硅胶做干燥剂
B.
必须改用适于它的脂类润滑油
C.
排气温度高需采用水冷
D.
不能用卤素检漏灯
【单选题】One day, a poor boy who was trying to pay his way through school by selling goods door to door found that he only had one dime left. He was hungry so he decided to beg for a meal at the next house. Ho...
A.
traveling expenses to school
B.
school tuition fee
C.
his meals
D.
a glass of milk
【单选题】以R134a代替过去常用的氟利昂作制冷剂，以下说法不对的是_______。
A.
不能用硅胶做干燥剂
B.
必须改用适于它的脂类润滑油
C.
排气温度高需采用水冷
D.
不能用卤素检漏灯
【简答题】One day, a poor boy who was trying to pay his way through school by sending newspapers door to door, was so hungry that he decided to beg for a meal at the next house. However, he lost his nerve when ...
【简答题】One day, a poor boy who was trying to pay his way through school by selling goods door to door found that he had ten cents left. He was hungry so he decided to beg* for a meal at the next house. Howev...
【简答题】A poor boy , named Howard Kelly , was trying to pay his way through school by selling goods door to door . He was hungry , 36 he decided to beg something to eat . When a young woman opened the door , ...
【单选题】以R134a代替过去常用的氟利昂作制冷剂,下列说法不正确的是。
A.
必须改用适于它的脂类润滑油
B.
不能用卤素检漏灯
C.
不能用硅胶作干燥剂
D.
排气温度高'需采用水冷
【简答题】One day, a poor boy who was trying to pay his way through school by selling goods door to door found that he only had one dime (一角硬币) left. He was hungry so he decided to beg for a meal at the next ho...
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