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【单选题】
RLC电路中，L=1H，C=1μF，R=0.1Ω，则谐振的角频率约为( )。A.
10rad/s
B.
100rad/s
C.
1000rad/s
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【简答题】Tests administered（实施）to most elementary and high-school students in the United States exert an unfavorable influence on science and math teaching, according to a new ＄1 million study performed for th...
【简答题】This part is to test your ability to do practical writing. You are required to write a consolation letter(慰问信) according to the following instructions given in Chinese. Remember to write the letter in...
【判断题】图形广告主要包括焦点图片广告、弹出窗口广告、通栏广告、按钮广告、全屏广告。4.网上商店除了通过网络直接销售产品这一基本功能之外,还是一种有效的网络营销手段。 ( )
A.
正确
B.
错误
【单选题】Areas where students have particular difficulty have been treated particular care.
A.
in
B.
by
C.
with
D.
under
【单选题】Dr. Jason decided to help his students by______.
A.
collecting used textbooks
B.
writing a concise textbook
C.
selling second-hand books
D.
making public speeches
【单选题】Which of the following is focused on writing?
A.
Labeling pictures according to their contents.
B.
Sequencing the pictures according to the story.
C.
Matching the pictures with the headings.
D.
Commenting on the pictures.
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