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【简答题】
中央电视台每周质量监测报告揭露了这样一个事件,不法奸商为使腌肉制品的色泽更吸引顾客,用超.量. 的亚硝酸钠(NaNO2)腌制。亚硝酸钠是一种潜在的致癌物质,过.量.或长.期.食用会对人体产生危害。由于亚硝酸钠有咸味,外观与氯化钠相似,曾多次发生过因误食而导致中毒的事件。经过查阅有关资料,我们了解到以下信息:亚硝酸钠的水溶液呈碱性,亚硝酸钠能将 Fe2+转化为 Fe3+。请回答以下问题: (1) 亚硝酸钠(NaNO2)所属物质类别是 ,其中氮元素化合价为 ; (2) 下列方法中,能用来区别 NaNO2 与 NaCl 固体的是 ; A.观察颜色 B.品尝味道 C.用水溶解 D.分别溶于水,测其 pH
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举一反三
【简答题】, they decided to get someone else to continue the work . A ． Given out B ． Giving out C ． To give out D ． Give out
【简答题】小题1:I wasn’t s___________________ to hear that he failed his math test 小题2:Would you please tell me something about your studying e________. 小题3:The girl was n_________________ when she heard the ne...
【单选题】I don't know the way. Please ask _ [ ]
A.
anyone else
B.
else anyone
C.
someone else
D.
else someone
【单选题】I don’t know the answer. Maybe you could ask _______.
A.
someone others
B.
anyone else
C.
someone else
D.
else someone
【单选题】The verb 'to lecture' someone doesn't just mean to teach someone. What else can it mean?
A.
to get someone's opinion
B.
to fantasise about someone
C.
to pass on some gossip
D.
to scold someone about someone or something
【单选题】初孕妇，26岁，妊娠40周，宫缩持续40秒，间歇5-6分钟，强度中等，胎心率154次/分，胎头拨露已1小时，无进展，阴道检查无异常，应诊断为
A.
协调性宫缩乏力
B.
不协调宫缩乏力
C.
骨产道异常
D.
胎位异常
E.
胎儿窘迫
【简答题】I failed to pass the exam although I had worked very hard. I should ____________ the causes of my failure.
【单选题】.8 I failed to pass the exam although I had worked very hard. I should __ the causes of my failure.
A.
analyse
B.
analysis
C.
analysing
D.
analysed
【单选题】初孕妇，26岁，妊娠40周，宫缩持续40秒，间歇5～6分，强度中等，胎心率154次/分，胎头拨露已1小时无进展，阴道检查无异常，应诊断为
A.
协调性宫缩乏力
B.
不协调性宫缩乏力
C.
骨产道异常
D.
胎位异常
E.
胎儿窘迫
【单选题】Someone must have taken it away this morning, ____?
A.
haven’t they
B.
hasn’t he
C.
don’t they
D.
didn’t he
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