钢门窗的铁脚，应采用______。
A．水泥砂浆
B．石灰砂浆
C．水泥袋纸
D．油灰
参考答案：A
He's one of those people with a very _______ imagination --- every time he hears a noise he's convinced it's someone breaking in.
A．adequate
B．relevant
C．abundant
D．vivid
在一个测回中，同一方向的盘左、盘右水平度盘读数之差称为（）
A.2C值
B.互差
C.测回差
D.半测回差
