不定项选择

八段锦中每一动作均作八遍

A．错误
B．正确

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用条件平差的改正数方程可以求得各观测值对应的（）。

答案： (1)
改正数；V

单项选择题

I  ______ your early visit to China when I will be able to pay back some of the hospitality I received during my memorable stay in your beautiful country. A.
  am look forward B.
  am looking forward to C.
am looking forward