回转减速箱声音异常的原因?
参考答案:
⑴齿轮掉齿或磨损过限;
⑵减速箱盖或电机底座螺丝松;
⑶立轴轴承间隙过大或轴头花帽螺栓退扣及电机小齿轮螺帽松动。
根据上、下文,填入合适的词,使对话完整。
Boy: Hi, Tina. You look stressed 1_____.
Girl: I am. I had a bad morning.
Boy: Really? What 2_____?
Girl: Well, first of all I overslept. By the time I got up, my brother had already gotten in the shower.
Boy: Oh, what a pain!
Girl: So, after he got out of the shower, I took a quick shower and got 3_____. But by the time I
went 4_____, the bus had already left.
Boy: Oh, no!
Girl: Oh, yes! So I ran all the way to school. But when I got to school, I 5_____ I had left my
backpack at home.
Boy: No wonder you look stressed out.
解放前夕,以四大家族为代表的官僚资本,占旧中国资本主义经济的80%,占全国工矿、交通运输固定资产的80%,官僚资本不仅控制着重工业,而且还控制着轻工业、金融业、公路、铁路……新中国成立后,到l949年底共没收官僚资本2858个,之后进行改造。下列对没收官僚资本表述不正确的是
A.是无产阶级革命的重要内容
B.使新 * * 掌握了同家经济命脉
C.标志着社会主义制度的确立
D.是人民当家作主的体现