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举一反三
【单选题】ARQ中，副台收到W RQ S RQ P A X Y Z则表示7位呼码为_____。
A.
XZYWSPA
B.
XYZWRQS
C.
PAXYZWS
D.
WSPAXYZ
【简答题】（14分，每空2分）某试剂厂用银（含杂质铜）和硝酸（含Fe 3+ ）反应制取硝酸银，步骤如下： （1）工业上一般选用中等浓度的硝酸和银反应来制取硝酸银。请在下表空格处填空。 优点 缺点 使用浓硝酸 反应速率快 酸耗较大，产生NO x 的量较多 使用稀硝酸 （2）步骤B加热保温的作用是 ： a． 有利于加快反应速率 b．有利于未反应的硝酸挥发 c．有利于硝酸充分反应，降低溶液中H + 的浓度 （3）...
【单选题】To comply with your request, we are quoting you ( ).
A.
as following
B.
as follow
C.
as follows
D.
follow
【单选题】To comply with your request, we are quoting you
A.
as follows
B.
as following
C.
as follow
D.
follow
【简答题】When quoting, please state your terms of payment and discount you would allow purchases ______ quantities of not less than 100 dozen ______ individual items． Prices quoted should include insurance and...
【判断题】You should use quotation marks when you are directly quoting hard information.
A.
正确
B.
错误
【简答题】某试剂厂用银（含杂质铜）和硝酸（含Fe 3+ ）反应制取硝酸银，步骤如下： （1）工业上一般选用中等浓度的硝酸和银反应来制取硝酸银。请在下表空格处填空。 （2）步骤B加热保温的作用是__________ ： a． 有利于加快反应速率 b．有利于未反应的硝酸挥发 c．有利于硝酸充分反应，降低溶液中H+的浓度 （3）步骤C是为了除去Fe 3+ 、Cu 2+ 等杂质，冲稀时产生沉淀的原因是_______...
【多选题】By quoting “If you live each day as if it was your last, someday you’ll most certainly be right”, Jobs meant that _____________________________.
A.
taking each day seriously
B.
there will be one day which is your last day
C.
finally the last day will come if we pray a lot for it
D.
taking every day as your last day may help you find out what is more important in your life.
【判断题】You should give background information of the person you are quoting from to make your quotation convincing and meaningful.
A.
正确
B.
错误
【简答题】电气化铁路附近发生火灾时，必须立即通知列车调度员、电力调度员或接触网工区值班人员，并遵守哪些规定？
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