皮皮学，免费搜题
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【多选题】
Which of the following are designed to consolidate students’learning of the learning materials?A.
examining students ’ recognition of pronunciations
B.
going abroad
C.
testing students ’ responses toward certain sentences
D.
asking students to match sentences with pictures
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皮皮学刷刷变学霸
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【单选题】There＇s no right amount of sleep for everyone，and generally sleep requirements decrease with age．
A.
每个人都没有恰当的睡眠量，一般来说，睡眠需求会随着年龄增长而减少。
B.
每个人所需的睡眠时间不尽相同，一般是随着年龄的增长而减少。
C.
睡眠不足者需求的睡眠量一般都随着年龄而减少。
D.
一个人没有固定的睡眠时间，一般会缩短寿命。
【单选题】If I knew the answers to all your questions, I ____ a genius!
A.
am
B.
would have been
C.
would be
D.
were
【单选题】If a child is born with low intelligence, he can
A.
become a genius
B.
still become a genius if he should be given special education
C.
exceed his intelligence limits in rich surroundings
D.
not reach his intelligence in his life
【单选题】I ______ the genius of your plan, but you still will not find backers.
A.
resort
B.
grant
C.
afford
D.
entitle
【单选题】在如图所示的电路中，若变压器次级电压的有效值【图片】，稳压管的稳压值【图片】，【图片】。正常情况下，电路的输出电压为 V。 【图片】
A.
9
B.
10
C.
12
D.
24
【简答题】在如图所示电路中,已知电网电压波动范围为± 10 %,当电网电压为 220V 时,变压器次级电压有效值为 U 2 。 选择一个正确答案填入空内。 1 .整流滤波后的电压平均值 __ 。 A 、 = U 2 B 、≈ 1.2 U 2 C 、 ≈ 0.9 U 2 2 .整流二极管所承受的最大反向电压 。 A 、 =1.1 U 2 B 、 = U 2 C 、 =2 U 2 3 .整流二极管流过的电流平均...
【单选题】Countries within the European Economic Community grant certain commercial ______ to each other.
A.
advantages
B.
benefits
C.
privileges
D.
subsidies
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