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【判断题】
合金钢是在普通碳素结构钢的基础上添加适量的一种或多种合金元素的钢,硬质合金属于合金钢。A.
正确
B.
错误
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【简答题】Many people like traveling for their holiday. They go to 1 , seaside or forests. Some people like 2 , so they like to visit some old interesting places. In many countries, the travel agency can he...
【简答题】数控机床按伺服系统的控制方式可分为（），（）和（）。
【单选题】The reason ________ many people like the film Not One Less is ________ most of the people in the
A.
20. The reason ________ many people like the film Not One Less is ________ most of the people in the film use their real names and play themselves. A．why; because
B.
for; that
C.
for; because
D.
why; that
【单选题】Many people like Xiao Shenyang because he often makes people _______ happily..
A.
laughing
B.
to laugh
C.
laugh
D.
laughs
【简答题】完形填空。 Many people today like reading stories about UFOs. Many people in different countries are 1 UFOs. But what are UFOs? There are some different ideas about UFOs. 2 popular one is that UFOs carried...
【单选题】At weekend many people living in the city like to go tothe village, _______ there are a lot of green plants and fresh air.
A.
around which
B.
aroundthat
C.
aroundwhere
D.
around what
【单选题】属于三级污水处理工艺的是( )。
A.
在污水处理设施进口处，必须设置格栅，主要是采用物理处理法截留较大的漂浮物，以便减轻后续处理构筑物的负荷，使之能够正常运转
B.
将污水中呈溶解性、胶体状态的有机污染物转化为无害物质，从而达到排放的要求，一般去除率能达到90%以上
C.
有机污染物可达到排放标准，处理后的五日生化需氧量(BOD 5 )可降至20～30 mg
D.
处理难以降解的有机物、磷和氮等能够导致水体富营养化的可溶性无机物等
E.
生物脱氮除磷法、混凝沉淀法、砂滤法、活性炭吸附法、离子交换法和电渗析法等
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