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【判断题】
中央银行的公开市场业务都是在二级市场而非一级证券市场进行的.( )A.
正确
B.
错误
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皮皮学刷刷变学霸
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【简答题】测量关键点之间的距离需要点击（ ）
【单选题】When the author says that we should intensify our efforts in nutrition education among our young people, he means that we should ______.
A.
force young people to eat well-balanced meals
B.
tell young people to eat liver, chicken, beef, or veal
C.
teach adolescents about nutrition in home economics class
D.
try to change eating habits to get enough iron and other essential nutrients
【简答题】铁盒罐头过期会出现“胖听”现象（内部产生大量气体，底和盖向外鼓胀），一般分为两类： （1）化学性“胖听”：一般是铁皮与罐内酸性物质反应产生气体． （2）生物性“胖听”：一般是罐内物质腐败所致． 用金属针头钉入罐头内，将气体导出进行如下实验，请填写下列实验报告： 实验内容 实验现象 化学方程式 属于何种“胖听” （1）点燃导出的气体，罩上玻璃杯 玻璃内壁有____出现 ____________ __...
【单选题】In the third paragraph, the author intends to______.
A.
give examples of the usefulness of the method.
B.
show the advantages of making accurate predictions
C.
reveal the text and questions in making prediction
D.
demonstrate how a sound prediction is made
【单选题】When the author says that we should intensify our efforts in nutrition education among our young people, he means that we ______.
A.
should force young people to eat well-balanced meals
B.
should tell young people to eat liver, chicken, beef or veal
C.
should teach adolescents about nutrition in home economics class
D.
should try to change eating habits to get enough iron and other essential nutrients
【单选题】Why does the person lose weight and feel very tired and uneasy?
A.
the body does not receive the water
B.
the body does not receive the oxygen
C.
the body does not receive the protein
D.
the body does not receive the sugar
【简答题】（8分）铁盒罐头过期会出现“胖听”现象（内部产生大量气体，底和盖向外鼓胀），一般分为两类： （1）化学性“胖听”：一般是铁皮与罐内酸性物质反应产生气体． （2）生物性“胖听”：一般是罐内物质腐败所致． 用金属针头钉入罐头内，将气体导出进行如下实验，请填写下列实验报告： 实验内容 实验现象 化学方程式 属于何种“胖听” （1）点燃导出气体，罩上玻璃杯 玻璃杯内壁有 出现 （2）导出气体通入澄清的石灰...
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