警察是国家机器的重要组成部分，是阶级专政的重要工具。( )
参考答案：对
We are allowed _____ part-time jobs after school. [ ]
A. having
B. to have
C. had
D. to having
男，40岁，食欲欠佳、恶心、尿黄已1周，查血ALT(谷丙转氨酶)显著增高，直接胆红素增高，应考虑
A．胆石症B．肝硬化C．胆道梗阻D．急性肝炎E．胆囊炎
