【简答题】当PLC置于RUN状态时,M8000(),M8002()。
【单选题】熔模铸造中,水玻璃型壳界面硬化的速度大大()硬化剂在型壳中的扩散,所以,型壳的硬化速度主要由()速度来决定。
【单选题】在制定核保政策时必须考虑是否符合公司经营方针,有利于促进保单销售,扩大市场份额的原则。这是在描述核保原则当中的( )
【单选题】If dogs could talk,perhaps we would find it just as hard to get along with them as we do with people. The sentence tells us that
A.
it's painful for us to get along with dogs
B.
it's fortunate that dogs could not talk
C.
it's difficult to get along with dogs
D.
it's not easy for us to get along with people as well as dogs