对于商业银行来说，以下一般不采用的担保方式是()。
A.动产留置
B.不动产抵押
C.外资企业连带责任保证
D.支票、汇票、本票等的抵押
参考答案：A
Studies show that 'people are more_________ to suffer from back problems if they always sit before
computer screens for long hours. [ ]
A. likely
B. possible
C. probable
D. sure
送风机、引风机、一次风机油站启动时需要做哪些试验，如何做？
