鱼与熊掌不可兼得
A．双趋冲突B．双避冲突C．趋避冲突D．多重冲突E．双重趋避冲突
参考答案：A
There ________ a teacher and thirty students in the classroom. [ ]
A. has
B. have
C. is
D. are
违反担保之诉的起诉根据是______
A．严格责任 B．疏忽C．买卖合同 D．法律
