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【单选题】
直线、平面、柱面垂直于投影面，则投影分别积聚为点、直线、曲线。是正投影法的 基本性质中的()。A.
类似性
B.
积聚性
C.
从属性
D.
性
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皮皮学刷刷变学霸
举一反三
【多选题】关于肽单元的描述,正确的是:
A.
是组成多肽链二级结构的基本结构
B.
形成肽键的六个原子不在一个平面内
C.
肽单元中与α碳相连的单键可以自由旋转
D.
相邻两个肽单元的相对位置与α碳两侧单键旋转无关
【简答题】Jennifer Lee's manufacturing company has purchased material from overseas, and is looking for a suitable place to keep it.
【单选题】Jennifer has never really ______ her son's death. It's very hard to accept the fact that she'll never have a child.
A.
come to terms with
B.
come up against
C.
come out with
D.
come down to
【单选题】The news that his wife Iris Holland was pregnant brought happiness to the couple. But unfortunately, his son Cole was born deaf. What is Mr. Holland’ s first reaction to this?
A.
Mr. Holland reacted with hostility to the news that he can never teach the joys of music to his own child.
B.
Mr. Holland gave up his teaching career and taught his son at home by himself.
C.
Mr. Holland didn’t accept this truth and wanted to deny the fact.
D.
Mr. Holland was so upset that he even stop his music dream.
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