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【判断题】
焊丝和母材中Mn、Si的原始含量高,有利于Mn、Si的还原。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】A. It was constructed without bricks. B. It was the tallest early skyscr. C. It contained offices where victims of the fire could get help. D. It had an internal metal skeleton.
【单选题】听力原文：(A) A man is driving the truck. (B) A man is holding the container. (C) Some containers are in the street. (D) A car is parked on the side of the road.
A.
B.
C.
【单选题】Ten people died in the car accident, two children _________.
A.
including
B.
contained
C.
included
D.
containing
【简答题】请编制3B格式线切割程序。
【单选题】This book ____ 12 units, _____ the unit of Music.
A.
contains. Including
B.
includes; containing
C.
contains, includes
D.
including; contains
【单选题】Packable resin composites( )
A.
have been marketed as amalgam alternatives
B.
always contain fluoride
C.
can be adequately polymerized to a depth of 5 mln using a halogen light-curing unit
D.
come in a broader range of shades than standard resin composites
【简答题】请编制3B格式的线切割程序
【判断题】BAF, CAF and port congestion surcharges are normally levied by the port authorities in marine container transportation.( )
A.
正确
B.
错误
【单选题】As a vessel sinks to a depth of 15 feet, the hydrostatic tip releases the life raft container from its cradle by ______.
A.
breaking the weak link
B.
releasing the tie-down strap
C.
pulling the operating cord
D.
releasing the CO2 canister
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