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【单选题】
合金工具钢刀具材料的热处理硬度是( )HRCA.
40~45
B.
60~65
C.
70~80
D.
85~90
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皮皮学刷刷变学霸
举一反三
【单选题】The author thinks it is good for local people to know well that tourism will ______.
A.
waste a lot of money
B.
weaken their economy
C.
help establish (建立) their customs
D.
help improve their life
【单选题】符合朗伯比尔定律的有色溶液稀释时，其最大吸收峰的波长位置改变是（）
A.
不移动，但峰高值降低
B.
不移动，但峰高值增大
C.
向长波长方向移动，且峰高值增大
D.
向短波长方向移动，且峰高值增大
E.
向短波长方向移动，且峰高值降低
【单选题】The author thinks it is ( ) in getting your money's worth.
A.
unbearable
B.
bad
C.
shameful
D.
no shame
【判断题】The author thinks it helpful to give several examples of distributed systems in order to prove that the systems are widely used.
A.
正确
B.
错误
【单选题】符合朗伯比尔定律的有色溶液稀释时,其最大吸收峰的波长位置( )。
A.
向长波方向移动
B.
向短波方向移动
C.
不移动,但最大吸收峰强度减小
D.
不移动,但最大吸收峰强度增大
【简答题】麻黄制绒的目的是__ 。
【单选题】The author thinks it is also very important to make sure ______.
A.
when your visitors will leave
B.
when your visitors will come
C.
when you will have your houseguests
D.
when you will have people staying with you
【单选题】The author thinks it is good for local people to know that tourism will__________ ．
A.
waste a lot of money
B.
weaken their economy
C.
help establish their customs
D.
help improve their lives
【简答题】麻黄制绒的目的是 。
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