在定量泵的供油系统中,流量阀必须与()并联,才能起调速作用。
A、减压阀
B、溢流阀
C、顺序阀
参考答案:B
五、单词拼写(10*1=10分)
61. He got into a p ___________when he found the house broken into.
62. If you s____________ to the morning paper it’ll be delivered to your door.
63. The students were so b___________ that some of them fell asleep.
64. The beautiful vase made in Qing Dynasty in the store is very p_________.
65. Her friend’s e___________ gave her the confidence to enter the competition.
66. During his a____________, another teacher took his place.
67. He has been living abroad since he r_________ from his job.
68. Without your a_______________, I couldn’t have succeeded.
69. We all c____________ out classmate on his becoming one of the Olympic torch holders.
70. If you g_________ something, you promise that it will definitely happen, or that you will do it for someone.
对于一个健康的、正在成长的公司来说,经营活动现金净流量应当是正数,投资活动现金净流量是正数,筹资活动现金净流量正、负数相间。( )