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【单选题】
关于分层图，下列说法错误的是( )。A.
分层图用于将大量的有一特定主题的观点、意见或想法按组归类
B.
分组活动中要激励每个人发挥创造性、充分地参与
C.
最好能由具有一定规模的小组来进行此项工作
D.
此工具常用于归纳由水平对比法产生的观点
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The classroom is big enough for 25 students for normal use you need more space for special activities.
A.
once
B.
because
C.
if
D.
unless
【单选题】According to the passage, how are meals sold in some Brazilian restaurants?
A.
Foods have very low but different prices.
B.
All dinners pay the same amount of money.
C.
Dinners pay according to the number of plates.
D.
Meals are charged according to their weight.
【简答题】判断信号通过系统 是否会失真,若失真,是幅度失真还是相位失真?
【简答题】在电路中,电能的单位常用单位是kWh,并且,1kWh的电能俗称为1度电。()
【简答题】判断信号通过系统 是否会失真,若失真,是幅度失真还是相位失真?
【单选题】Our physics teacher told us that light _______ faster than sound.
A.
travel
B.
travels
C.
is travelling
D.
has travelled
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