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【简答题】
在 “探究水沸腾时温度变化的特点”实验中,实验装置如图所示: ( 1)安装实验器材时应按照 (填 “自上而下”或“自下而上”)的顺序进行; ( 2)实验中除了图中的器材之外,还需要的测量工具是______ ; (3)如图, a 、 b 是两个实验小组绘制的沸腾图像,由图像可知实验中他们所用水的______不同;为减少从开始加热到沸腾所用的时间,可采取的措施是______________________(写出一种即可) ; 若水在沸腾时,烧杯中的气泡在上升的过程中,气泡的变化情况是 ______ (选填“变大”或“变小”);根据实验现象可得水的沸腾条件是_____________________。
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【单选题】Which website in the following does not belong to B2B platform?
A.
www.alibaba.com
B.
www.busytrade.com
C.
www.taobao.com
D.
www. made-in-china.com
【单选题】In our school there are fifty-five ___.
A.
women teachers
B.
woman teachers
C.
women teacher
D.
woman’s teacher
【单选题】( )20, There are five pairs _______, but I'm at a loss which to buy. which to buy.
A.
to be chosen
B.
to choose from
C.
to choose
D.
for choosing
【简答题】( )20,There are
five pairs ______,but I’m at a loss which to buy.A. to be chosen B. to choose from C. to choose D. for choosing
【单选题】Which website in the following does not belong to B2B platform?
A.
www.alibaba.com
B.
www.busytrade.com
C.
www.taobao.com
D.
www.made-in-China.com
【单选题】Which website in the following does not belong to B2B platform?
A.
www.busytrade.com
B.
www.alibaba.com
C.
www.taobao.com
D.
www.made-in-china.com
【单选题】If there are five goods in a barter economy, one needs to know ten prices in order to exchange one good for another. If, however, there are ten goods in a barter economy, then one needs to know ______...
A.
20
B.
25
C.
30
D.
45
【单选题】which website in the following does not belong to b2b platform?
A.
Www.made-in-china.com
B.
Www.busytrade.com
C.
Www.taobao.com
D.
Www.alibaba.com
【单选题】Which website in the following does not belong to B2B platform?
A.
www.alibaba.com
B.
www.taobao.com
C.
www.busytrade.com
D.
www.made-in-china.com
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