根管治疗时器械折断根管内的常见原因
A．器械陈旧有折痕B．操作方法不当C．器械质量不佳D．开髓不充分，进路不通畅E．以上都是
参考答案：E
期货公司有关联关系的股东持股比例合计达到（）的，持股比例最高的股东的净资产应不低于实收资本的50%，或有负债应低于净资产的50%，且不存在对财务状况产生重大不确定影响的其他风险。
A.3%
B.5%
C.7%
D.10%
Dad said that there wasn't ______ in the book he bought yesterday. [ ]
A. anything amazing
B. amazing something
C. something amazing
D. amazing anything
