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【简答题】
色度坐标是如何计算的?
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【单选题】--Why has he been staying at home these days? --He ___________ since a month ago.
A.
has been out of work
B.
was out of work
C.
has lost his work
D.
had left from his work
【简答题】The reason why he has been such a success is____he never gives up.A. what B. where C. how D. that
【简答题】小一班的毛毛从幼儿园回家一直噘着小嘴,一副可怜的样子。妈妈一问才知道,今天幼儿园小朋友画画比赛,很多小朋友都得了五角星,可毛毛没有。毛毛越说越委屈,“哇”地一声哭了。请根据上述材料,分析毛毛的心理,并为毛毛妈妈提供教育孩子的建议。
【单选题】The reason why he has been such a success is ___ he never gives up.
A.
what
B.
that
C.
because
D.
how
【简答题】苯巴比妥钠中重金属的检查方法如下:取本品适量,加水32ml,溶解后缓缓加稀盐酸溶液8ml,充分振摇,滤过,取滤液20ml,加酚酞指示剂1滴与氨试液适量至溶液恰显粉红色,加醋酸盐缓冲液2ml与水适量使成25ml,依法检查,含重金属不得过百万分之十。若标准铅溶液(每1ml相当于10μg的Pb)为1ml,计算供试品取样量。
【简答题】苯巴比妥钠中重金属的检查方法如下:取本品2 . 0g ,加水32 ml,溶解后缓缓加1 mol / L 盐酸溶液8 ml ,充分振摇,静置数分钟,滤过滤液20 ml ,加酚酞指示液1 滴与氨试液适量至溶液恰显粉红色,加醋酸盐缓冲液(PH 为3 . 5 ) 2 ml 与水适量使成25 ml,依法检查,含重金属不得超过百万分之十。 试计算应取标准铅溶液(每1 ml 相当于10 ugPb )的体积.
【单选题】—Why has he been so upset? —He didn’t leave the things _____ they belonged, for _____ he was scolded by his parents.
A.
which; that
B.
which; this
C.
where; whose
D.
where; which
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