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【多选题】
后退步行走的要领:A.
向后退两三步，再转身离去。
B.
退步时，脚要轻擦地面，不可高抬小腿，后退的步幅要小
C.
转体时要先转身体，头稍后再转。
D.
适用于向他人告辞时
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【单选题】The companies are working together to create ______ they hope will be the best means of transport in the 21 st century.
A.
which
B.
that
C.
what
D.
Who
【单选题】21 By which means is a contractor able to control cost overruns due to changing requirements?
A.
Project data review
B.
Change order
C.
Purchase order amendment
D.
Change control
E.
None of the above
【多选题】剪纸具有广泛的群众基础,交融于各族人民的社会生活,是各种民俗活动的重要组成部分。其传承 赓续 的视觉形象和造型格式,蕴涵了丰富的文化历史信息,表达了广大民众的社会认知、道德观念、实践经验、生活理想和审美情趣,具有()()()()、娱乐、交往等多重社会价值
A.
认知
B.
教化
C.
表意
D.
抒情
【单选题】The companies are working together to create they hope will be the best means of transport in the 21 st century.
A.
which
B.
that
C.
what
D.
who
【单选题】"Stay the course" in Paragraph 21 means ______.
A.
Keep moving
B.
Not give up
C.
Not change the way
D.
Remain the current condition
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