用同一离心泵分别输送密度为ρ1及ρ2=1.2ρ1的两种液体,已知两者的体积V相等, 则 He2()He1:
用同一离心泵分别输送密度为ρ1及ρ2=1.2ρ1的两种液体,已知两者的体积V相等, 则 He2()He1:
Now he is ___ artist. 1 have known him since he was ___ one-year-old boy.
Now he is ___ artist. 1 have known him since he was ___ one-year-old boy.
1) He ____ his prospects by carelessness.
1) He ____ his prospects by carelessness.
He ___(1)___(go) to the park yesterday.
He ___(1)___(go) to the park yesterday.
1 He has a big office.
1 He has a big office.
In 1843, he succeeded Southey as “ 1 ”.
In 1843, he succeeded Southey as “ 1 ”.
He ____(购买) the land for $1 million.
He ____(购买) the land for $1 million.
【填空题】两敞口容器间用离心泵输水,已知转速为n1时,泵流量【图片】1=100l/s, 扬程He1=16 m; 转速为n2时,【图片】2 =120 l/s, 扬程He2=20m, 则两容器的垂直距离=_____ m
【填空题】两敞口容器间用离心泵输水,已知转速为n1时,泵流量【图片】1=100l/s, 扬程He1=16 m; 转速为n2时,【图片】2 =120 l/s, 扬程He2=20m, 则两容器的垂直距离=_____ m
He was convicted of _________ investors out of$1 million.
He was convicted of _________ investors out of$1 million.
1 Socrates was _______________________. He is a patron saint of philosophy. 2 He was born in ________ in _______. 3 As a young man, he had been a brave soldier ____________________________. 4 In middle age, he ___________________________________. 5 In 399 BC, _______________________________________________.
1 Socrates was _______________________. He is a patron saint of philosophy. 2 He was born in ________ in _______. 3 As a young man, he had been a brave soldier ____________________________. 4 In middle age, he ___________________________________. 5 In 399 BC, _______________________________________________.