填空题


【参考答案】

also∧→on
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填空题
frequency→frequencies
单项选择题
A．It increased the students’ white blood cell count.B．It increased some students’ energy level.C．It improved the students’ ability to play musical instruments.D．It released a natural painkiller in some students’ bodies.
A．It increased the students’ white blood cell count.
B．It increased some students’ energy level.
C．It improved the students’ ability to play musical instruments.
D．It released a natural painkiller in some students’ bodies.
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