问题
多项选择题
离心泵运行时，开大出口阀，（）。
A.流量降低
B.流量增加
C.无变化
D.压力降低
答案
参考答案：B, D
搜题请搜索小程序“爱下问搜题”
离心泵运行时，开大出口阀，（）。
A.流量降低
B.流量增加
C.无变化
D.压力降低
参考答案：B, D
Jerry was always in a good mood. someone was having a bad day, Jerry would tell him how to look on the positive(积极的)side of the situation. One day I asked him, “How can you be positive all the time?” Jerry replied, “Each morning, I say to , ‘Jerry, you have two choices today. You can choose to be in a good mood or in a bad mood.’ I choose to be in a good mood.” Several years later, I heard Jerry was hurt three robbers(强盗). Luckily, Jerry was sent to the quickly. I asked him what his thought was when the robbery took place. Jerry replied, “As I on the floor, I remembered I could choose to live or to die. I choose to live.” “Weren’t you I asked. “Yes, I was really afraid when I saw the expressions on the of the doctors.” “What did you do?” I asked. “When a nurse asked if I was allergic(过敏的)to . I shouted, ‘Bullets(子弹)!’ Over their laughter, I told them, ” Thanks to the super medical of his doctors, Jerry lived, but also because of his amazing attitude, Attitude, after all, is everything.
|
