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【单选题】
python创建字符串 s="hello world!",要获取其中的子字符串"ello w",则正确写法是A.
s[2:7]
B.
s[1:6]
C.
s[2:8]
D.
s[1:7]
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举一反三
【多选题】对于焊条E4315描述正确的是
A.
焊条可接直流电，接电源正极或负极均可
B.
焊条可接交流或直流正反接
C.
熔敷金属的抗拉强度≥550MPa
D.
熔敷金属的抗拉强度≥430MPa
E.
焊条为碱性焊条
F.
药皮类型为钛型
G.
药皮类型为低氢钠型
【单选题】It was Tom as well as his friends that ________ for the serious accident.
A.
was to be blamed
B.
were to blame
C.
was blaming
D.
was to blame
【简答题】Tom, as well as his friends, (like)______playing computer s.
【单选题】Tom as well as his friends who football matches to school today. [ ]
A.
likes, hasn't gone
B.
likes, haven't gone
C.
like, hasn't gone
D.
like, haven't gone
【单选题】Tom is a very______student, nice and polite towards his teachers as well as his schoolmates.
A.
respective
B.
respectful
C.
respectable
D.
respecting
【多选题】某材料包装袋上标有的E4315字样,以下描述正确的是
A.
包装内装的焊条
B.
熔敷金属的抗拉强度≥43MPa
C.
熔敷金属的抗拉强度≥430MPa
D.
药皮是低氢钠型
E.
焊条属于酸性焊条
F.
焊条属于碱性焊条
G.
此焊条可接直流电也可接交流电
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