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【简答题】
测量误差的表示方法包含______和________。
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反馈参考答案：
举一反三
【单选题】Since the early 1990s, conservationists have______protecting the Amazon in part because of its abundance of plant and animal species.
A.
called forth
B.
called back
C.
called up
D.
called for
【简答题】听力原文：In the early 1990s, before the Internet redefined the , Motorola was among America's most successful technology companies. (83)
【多选题】关于第一学段识字与写字,新课标提出( )。
A.
识字写字是阅读和写作的基础
B.
1 ～ 2 年级要多认少写
C.
引导学生掌握基本的书写技能
D.
初步感受汉字的形体美
E.
会写1600字
【多选题】1992 年春邓小平南方谈话中明确提出了( )
A.
社会主义商品经济理论
B.
社会主义市场经济理论
C.
社会主义初级阶段理论
D.
社会主义本质理论
E.
“ 三个有利于 ” 标准的理论
【单选题】I can still remember that it is since the 1990’s, _____ we began to use cell phones,_______ the number of mobile users has greatly increased．
A.
while; when
B.
when; what
C.
before; that
D.
when; that
【单选题】In addition to the farming they ______ since the 1990s, the Smiths have started a small business.
A.
have done
B.
had been done
C.
were doing
D.
have been doing
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