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【单选题】
企业获准质量管理体系认证的有效期为()年。
A.
1
B.
3
C.
5
D.
10
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【简答题】(7分)实验室配制480 mL 0.1mol·L -1 NaOH溶液,回答下列问题 (1)应用托盘天平称取氢氧化钠固体 ▲ g。 (2)配制NaOH溶液时需用的主要仪器有托盘天平、药匙、烧杯、玻璃棒、量筒、 ▲ 。 (3)若实验遇下列情况,则所配溶液的物质的量浓度是  A、偏高  B、偏低  C、不变(用符号回答) ①定容时俯视刻度线 ▲ ; ②放在滤纸上称量NaOH固体 ▲ 。 (4)请你帮助把...
【判断题】蒙台梭利认为纪律就意味着自由。
A.
正确
B.
错误
【单选题】Col. Quirk Browne was lucky to be able to telephone the fire brigade______.
A.
because it was a Sunday
B.
because the wires were burnt soon after the call
C.
because he was trapped upstairs
D.
because the house was a long way from the town
【单选题】Which of the following BEST explains what the global community should do?
A.
To supervise the construction of schools.
B.
To take prompt and effective actions.
C.
To provide water and power supply.
D.
To prevent instability and aggression.
【单选题】常用的网页动画制作工具是 。
A.
Photoshop
B.
Dreamweaver
C.
Flash
D.
Fireworks
【单选题】It can be concluded from the passage that the Philadelphia Museum of Art ______.
A.
only collects paintings by American artists
B.
has sold many paintings to foreign collectors
C.
has a larger collection of paintings than other museums
D.
only exhibits a portion of its collection of paintings
【单选题】Don’t throw away the waste paper. It needs so that it can be reused.
A.
to destroy
B.
destroying
C.
to collect
D.
colleting
【单选题】最常用的网页动画制作工具是( )
A.
Photoshop
B.
Fireworks
C.
Flash
D.
Dreamwerver
【多选题】确定再订货点时,需要考虑的因素有( )。
A.
经济订货批量
B.
每日耗用材料数量
C.
材料的在途时间
D.
每次的订货成本
【多选题】确定再订货点时,需要考虑的因素有(    )。
A.
经济订货批量    
B.
每天消耗的原材料数量
C.
原材料的在途时间    
D.
每次的订货成本
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