氧气压缩机的气缸内,严禁用()润滑,否则会引起爆炸。
参考答案:油
Three days enough to finish the work. Let my do it. [ ]
A. are
B. was
C. is
D. were
甲乙双方签订买卖合同,丙为乙的债务提供保证,但保证合同中未约定保证方式及保证期间,下列说法正确的是()。
A.丙的保证方式为一般保证
B.保证期间与买卖合同的诉讼时效相同
C.如果甲在保证期间内未要求丙承担保证责任,则丙免除保证责任
D.如果甲在保证期间内未经丙书面同意将主债权转让给丁,则丙不再承担保证责任