The do-it -yourself shop is a curious establishment. In it you can find anything from the tiniest screw to a self-assembly greenhouse. There is paint, glue, oil and wire for all purposes. There are tiles, selves, carpets and pipes of all shapes and sizes. You can even buy a complete bathroom suite in the larger self-service stores.
Today there is much more leisure time and, in many cases, much less money available. Do-it-yourself has become a money-saving hobby. It is no wonder that fewer tradesmen make a living from private homes. Pipes can be joined together by pushing, paint that can be rolled on doesn't drip, and holes can be drilled at the press of a button. Anyone can do it! Well, almost!
Why does the writer suggest that you should do the work yourself?.
A.You could save money.
B.There are many books magazines and manuals on the subject.
C.It is easy to find the right tools and materials nowadays..
D.All the reasons mentioned above.
第3题
下列流量计中,流体流经()时,压力损失最大。
A.文丘里流量计
B.电磁流量计
C.转子流量计
D.喷嘴流量计
第8题
A.蒸汽流动在过热器中存在压力损失
B.蒸汽流动在水冷壁中存在压力损失
C.蒸汽流动在省煤器中存在压力损失
D.蒸汽流动在再热器中存在压力损失
第9题
A.压力损失随流量增加而增加
B.压力损失随压力增加而增加
C.压力损失随粘度增加而增加
第10题
A.压力损失随流量增加而增加
B.压力损失随压力增加而增加
C.压力损失随粘度增加而增加
D.压力损失随机械杂质增加而增加
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!