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【简答题】
一个书架上第一层放了46本书，第二层和第三层共放了70本书，第四层放了52本书，平均每层放了多少本书？
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反馈参考答案：
举一反三
【单选题】互感器检定中使用的电源及调节设备，应保证具有足够的容量及调节细度，并应保证电源的频率为（），波形畸变系数不得超过5%。
A.
50Hz
B.
51±0.2Hz
C.
51±0.5Hz
D.
51±0.1Hz
【单选题】—I saw you come to school by bus this morning. —Oh, I _______ come to school by bus, but it is raining today.
A.
sometimes
B.
always
C.
hardly
D.
usually
【简答题】在老师的教育下,他明确了学习态度。
【简答题】功可以有两种:一种是( ),另一种是( )。
【单选题】How did it that the child dropped out of school?
A.
come in
B.
come about
C.
come across
D.
come on
【单选题】I ______ an old school friend in Oxford Street this morning.
A.
come into
B.
come across
C.
come out
D.
come off
【单选题】— I saw you come to school by bus this morning. — Oh, I come to school by bus, but it is raining today. [ ]
A.
hardly
B.
always
C.
sometimes
D.
usually
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