皮皮学，免费搜题
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【判断题】
使用领带夹时只要夹住领带就行。( )A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】碱溶酸沉法适用于分离
A.
具有内酯键的萜类化合物与不具有内酯键的萜类化合物
B.
具有内酯键的萜苷类化合物与不具有内酯键的萜苷类化合物
C.
具有内酯键的萜类化合物与不具有内酯键的萜类及其它化合物
D.
具有羰基的萜类化合物与不具有羰基的萜类化合物
【多选题】碱溶酸沉法适用于分离
A.
具有内酯键的萜类化合物与不具有内酯键的萜类化合物
B.
具有内酯键的萜苷类化合物与不具有内酯键的萜苷类化合物
C.
具有内酯键的萜类化合物与不具有内酯键的萜苷类化合物
D.
具有内酯键的萜类化合物与不具有内酯键的萜类及其它化合物
【单选题】If you eat only local produce, you will have to .
A.
only eat what is in season, and spend a little more money
B.
stop eating bananas
C.
ride your bike more and buy more apples
【单选题】The cost of basics like milk, bread, potatoes and bananas has jumped in the past year, forcing families to nix luxuries, steer away from organic goods and buy more house brands. What does customer El...
A.
The price elasticity of demand for food is higher than for clothes
B.
The price elasticity of demand for food is lower than for clothes
C.
Income elasticity of demand for food is positive
D.
Income elasticity of demand for food is negative
【单选题】If you eat only local produce, you will have to __ .
A.
a. only eat what is in season, and spend a little more money
B.
b. stop eating bananas
C.
c. ride your bike more and buy more apples
【简答题】综合运用本节所学知识,完成花瓶模型的制作,简略写出相关步骤。
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