皮皮学，免费搜题
登录
搜题
【简答题】
在他励直流电动机的几种调速方法中，______调速方法效率最低。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】How did Eiffel make the iron belt running from pillar to pillar perfectly horizontal?
A.
He made a careful plan.
B.
He used hair to test whether the tower is tilting.
C.
He embedded water jack in the column.
D.
He deployed creeper cranes.
【单选题】Manufactures make most engine pistons from ________, which is less than half the weight of iron.
A.
iron
B.
nickel
C.
chromium
D.
aluminum
【单选题】Cast iron can be used to make? 铸铁可以制作?
A.
gates
B.
railing
C.
engines
D.
medical instruments
【简答题】make —— iron and glass —— different —— others
【单选题】Manufacturers make most engine piston from ______, which is less than half the weight of iron.
A.
iron
B.
nickel
C.
chromium
D.
aluminum
相关题目：
参考解析：
知识点：
题目纠错 0
发布
