由于采油树（）会造成刺漏。
A、卡箍紧固螺栓松
B、卡箍过大
C、卡箍钢圈损坏
D、管线不对中
参考答案：A, B, C, D
The sales manager of the company suggested more money is to spent in a more effective advertising campaign and better packaging design.
A．is spending on
B．will be spent in
C．will be spent on
D．be spent on
硫酸铵是一种速效性肥料，属于生理（）肥料。
A.酸性
B.碱性
C.中性
D.酸或碱性
