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【单选题】
下列各组有机物只用一种试剂无法鉴别的是( )。A.
苯、甲苯、环己烷
B.
苯、苯酚、己烯
C.
乙醇、甲苯、硝基苯
D.
乙醇、乙醛、乙酸
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【单选题】Never leave food outside the refrigerator for more than two hours and keep refrigerator food _______________ 40°F.
A.
above
B.
below
C.
after
D.
before
【单选题】对于一级反应,下列说法中不正确的是
A.
lnc对时间t作图得一直线
B.
半衰期与反应物起始浓度成反比
C.
速率常数的单位为(时间)
D.
同一反应消耗反应物的百分数相同时,所需时间相等
【单选题】Never leave food outside the refrigerator _______________ more than two hours and keep refrigerator food below 40°F.
A.
to
B.
on
C.
in
D.
for
【单选题】Pressure Cooker ( 压力锅 ) Safety When you are cooking with a pressure cooker, you should learn a fewcommon sense ( 常识 ) rules: 1. Never leave the cooker unwatched when it is in use. 2. Add sufficient li...
A.
keep the cooker under close watch
B.
always keep the cooker half full
C.
never leave the cooker empty
D.
never turn off the stove
【简答题】Pressure Cooker Safety When you are cooking with a pressure cooker, you should learn a few common sense rules. 1. Never leave the cooker unwatched when it is in use. 2. Add sufficient liquid but never...
【简答题】Pressure Cooker Safety When you are cooking with a pressure cooker, you should learn a few common sense rules. 1. Never leave the cooker unwatched when it is in use. 2. Add sufficient liquid but never...
【简答题】仿写短文 要求:参照 Leading in 前两段,请用英语简要介绍 2 种中国食物。开头已给出,不少于 4 句。 When talking about the symbols of Chinese Food, probably we will never leave out and .
【单选题】Reading Comprehension Pressure Cooker ( 压力锅 ) Safety When you are cooking with a pressure cooker, you should learn a few common sense ( 常识 ) rules: 1. Never leave the cooker unwatched when it is in us...
A.
keep the cooker under close watch
B.
always keep the cooker half full
C.
never leave the cooker empty
D.
never turn off the stove
相关题目：
【单选题】对于一级反应,下列说法中不正确的是
A.
lnc对时间t作图得一直线
B.
半衰期与反应物起始浓度成反比
C.
速率常数的单位为(时间)
D.
同一反应消耗反应物的百分数相同时,所需时间相等
参考解析：
知识点：
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