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搜题/搜资源
【单选题】【消耗次数:1】
She resorted to ____ when she had no money to buy foods for her children.
①
have stolen
②
steal
③
stole
④
stealing
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相关题目
【单选题】
She resorted to _____ when she had no money to buy foods for her children.
①
have stolen
②
steal
③
stole
④
stealing
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【判断题】
She had her finger cut when she is paper-cutting.
①
正确
②
错误
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【单选题】
It was not until she had finished all her work_____.
①
did she return
②
that she returned
③
when she returned
④
that did she return
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【单选题】
When she was criticized, she claimed that it was outside her _____of responsibility.
①
field
②
limit
③
extent
④
range
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【单选题】
She went to the bank to____________ her money.
①
call in
②
draw out
③
find out
④
suffer from
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【单选题】
Lindas parents died when she was a baby, and she was __________ by her aunt.
①
turned into
②
raised up
③
grown up
④
brought up
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【单选题】
It was not until she had arrived home __________ remembered her appointment with the doctor.
①
when she
②
that she
③
and she
④
she
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【单选题】
_____ for the fact that she broke her leg, she might have passed the exam.
①
Had it not been
②
Hadnt itbeen
③
Was it not
④
Were it not
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【单选题】
When she saw the clouds, she went back to the house to ____ her umbrella.
①
bring
②
fetch
③
take
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carry
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【单选题】
She happily deposits the money she has earned teaching English in her savings account. Find any misplaced modifier in the sentence
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happily
②
she has earned
③
in her savings account
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随机题目
【单选题】
中药气调养护法的主要目的是
①
充氮
②
充二氧化碳
③
充氧
④
降氧
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一般药材取样量
①
25g
②
100~500g
③
5—10g
④
50g
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吸附色谱法分离生物碱常用的吸附剂是硅胶
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水溶性生物碱分离的常用方法是雷氏盐沉淀法
①
正确
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错误
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生物碱的薄层色谱和纸色谱法常用的显色剂是改良碘化铋钾
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正确
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碱性不同生物碱混合物的分离可选用pH梯度萃取法
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碱性较强的生物碱在植物体内的存在形式多为无机酸盐
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用乙醇提取生物碱可提出
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游离生物碱
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生物碱无机酸盐
③
生物碱有机酸盐
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季铵型生物碱
⑤
两性生物碱
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【多选题】
常用于检识生物碱的试剂是
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碘化铋钾试剂
②
醋酸镁试剂
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碘化汞钾试剂
④
雷氏盐试剂
⑤
苦味酸试剂
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①
氮原子的杂化方式
②
诱导效应
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羟基数目
④
内酯结构
⑤
分子内氢键
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