整体吊弦预制长度与计算长度相等误差不大于()。
A、2mm
B、-2mm
C、±2mm
D、±1mm
参考答案:C
He wanted to ____ the National Team to compete in the Summer Olympic Games for his country but
he was disappointed that he failed at the qualifying stage. [ ]
A. attend
B. take part in
C. join
C. join in
______ some milk in the glass. [ ]
A. There are
B. There is
C. It's
D. Its