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【单选题】
代号为7212AC的滚动轴承，对它的承载情况描述最准确的是（）A.
只能承受径向负荷
B.
单个轴承能承受双向轴向负荷
C.
只能承受轴向负荷
D.
能同时承受径向负荷和单向轴向负荷
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反馈参考答案：
举一反三
【单选题】Why Google can't claim victory?
A.
Google doesn't agree to certain conditions.
B.
The European Union needs to sign off on the merge.
C.
Google has raised concerns about consumer privacy.
D.
Google can't begin incorporating DoubleClick into it's business.
【简答题】当时的条件不允许帮助你。 Conditions didn't________ ________you．
【单选题】One of the solutions suggested to improve the conditions of underdevelopment is ______.
A.
to build more factories
B.
to obtain technical advisors from the Western world
C.
to upgrade the educational and science programs
D.
to increase production and raise profits
【单选题】Something is wrong with his camera. It can’t be _______ to take photos in cloudy conditions.
A.
adapted
B.
adjusted
C.
adopted
D.
contradicted
【单选题】He couldn’t _____ the terrible working conditions in the factory and decided to leave at once. [ ]
A.
catch up with
B.
put up with
C.
keep up with
D.
come up with
【单选题】20CrMnTi是常见的合金渗碳钢,其最终热处理为( )。
A.
渗碳+表面淬火+低温回火
B.
渗碳+淬火+低温回火
C.
渗碳+淬火+中温回火
D.
渗碳+淬火+高温回火
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