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【多选题】
通过焊接性试验,可以用来 ( )。A.
选择适合的焊接材料
B.
确定合适的焊接工艺参数
C.
确定焊接接头的抗拉强度
D.
确定合适的热处理工艺参数
E.
研制新的焊接材料
F.
考核焊工技术水平
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举一反三
【单选题】State and local government______the safety, structure, and appearance of the community through use of local law.
A.
regain
B.
recreate
C.
repute
D.
regulate
【简答题】种子萌发(seed gemination)
【单选题】Banks' asset portfolios include state and local government securities because
A.
they help to attract business from these government entities.
B.
banks consider them helpful in attracting accounts of Federal employees.
C.
the Federal Reserve requires member banks to buy securities from state and local governments located within their respective Federal Reserve districts.
D.
there is no default-risk with state and local government securities.
【单选题】随机选取列表['apple' , 'pear' , 'peach' , 'orange']中的1个字符串的Python代码是：
A.
from random import* sample(['apple' , 'pear' , 'peach' , 'orange'])
B.
from random import* choice(['apple' , 'pear' , 'peach' , 'orange'])
C.
from random import* ls = ['apple' , 'pear' , 'peach' , 'orange'] shuffle(ls)
D.
给出的选项都不正确
【简答题】什么是条件电极电位?为什么要引入条件电极电位?影响条件电极电位的因素有哪些?
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