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【多选题】
标注组合体尺寸的步骤和方法是A.
形体分析
B.
选定尺寸基准（三个方向，长度、宽度和高度）
C.
标注尺寸（总体尺寸、定形尺寸和定位尺寸）
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举一反三
【单选题】The mother was afraid to let the boy ______ the tree.
A.
to risk climbing
B.
risk climbing
C.
to risk to climb
D.
risk to climb
【单选题】What can we learn about the dialogue?
A.
The mother was not a good cook.
B.
The boy doesn't like MacDonald.
C.
They sometimes go out for dinner.
【单选题】The mother was nervous because she had not her son who was away at a boarding school.
A.
heard from
B.
heard of
C.
heard about
D.
heard out
【单选题】In the car accident the mother was killed, but her two-year-old son was found_____.
A.
alive
B.
lively
C.
living
D.
live
【简答题】The mother was so sad that she didn't want to say anything.(否定句) The mother was _____ sad _____ say anything.
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