If a gasoline engine turns over freely but will not start，the cause is generally（）.
A. a defective ignition system
B. low lube oil level
C. weak valve springs
D. too heavy a load
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消防水泵应（）试运一次。
A. 每月
B. 每周
C. 每天
D. 每季度
Why shiprepair is an inherently difficult business to manage in the conventional sense?（）
A. Because it is difficult to plan and manage
Because it is cannot be well categorized
C. Because it is a difficult work for people to undergo
D. Because it is seldom researched by research
当事人认为听证主持人与本案有直接利害关系的，有权申请回避。
A. 正确
B. 错误
大宗商品国际贸易融资业务项下进口商信用风险管理要求不包括（）。
A. 严格审查客户贸易背景真实性
B. 严格审查销售周期及生产周期与信用证付款期限是否匹配
C. 加强贷后管理，动态监控客户的生产经营、财务状况、履约记录
D. 动态监控出口货物销售情况，确保货款及时回笼
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