形状误差一般说来（）位置公差。
A、大于
B、小于
C、等于
参考答案：B
放映幻灯片文稿时，当按下"SPACE"（空格）键时，将会（）
A.切换到下一张
B.切换到上一张
C.切换到第一张
D.切换到最后一张
E.结束放映
She was busy, or she _________ him more help. [ ]
A. had given
B. would give
C. could have given
D. give
