冠心病病人的合理饮食是 ()
A.高热量、高盐
B.低热量、低盐
C.高胆固醇、高盐
D.低胆固醇、低盐
E.高热量、低蛋白质
参考答案:D
There ________ lots of trees on both sides of this street.But now they are all gone.
A.used to have
B.are used to be
C.used to be
D.are used to have
轴向位移达()mm或()mm时报警、()mm或()mm时、事故停机电磁阀动作停机。