全站停电时,应先拉开电容器组断路器后,再拉开各路出线断路器。
参考答案:对
This is the first time we ________ a film in the cinema together as a family.
A.see
B.had seen
C.saw
D.have seen
关于肾血管性高血压哪些是正确的( )
A.发病多急骤B.降压药物控制好C.无高血压家族史D.多数舒张压升高明E.年龄小于30岁或大于50岁