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【判断题】
在进行化学实验时,必然会用到各种化学试剂,其中有不少为危险化学品。因此,在使用化学试剂之前,首先应认真阅读该化学试剂的安全使用说明书 ( SDS) ,必须对其是否易易爆、是否有腐蚀性、是否有毒、是否有放射性、是否有强氧化性等性能有一个全面的了解,在使用时有针对性地采取一些安全防范措施,以避免由于使用不当造成的对实验人员及实验设备的危害。A.
正确
B.
错误
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举一反三
【单选题】In China today women ___ 40% of the workforce, and nearly half of the others with children are in paid work.
A.
build up
B.
hold on
C.
make up
D.
stand for
【单选题】Anything else? ()
A.
We provide education relating to depression and anxiety.
B.
First, we provide education relating to depression and anxiety.
C.
Moreover, we provide education relating to depression and anxiety.
【简答题】c a. of or relating to a culture or civilization
【单选题】According to this article, the people who have many problems relating to tax are ______.
A.
the old.
B.
the young.
C.
the banks.
D.
the finance ministers of various countries.
【单选题】On 1 January 20X6, Gardenbugs Co received a $30,000 government grant relating to equipment which cost $90,000 and had a useful life of six years. The grant was netted off against the cost of the equip...
A.
A
B.
B
C.
C
D.
D
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