单项选择题

A．It increased the students’’ blood pressure.
B．It increased some students’’ energy level.
C．It released a natural painkiller in some students’’ bodies.
D．It improved the students’’ ability to play musical instrument s.
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单项选择题
A．How to find the way to exam polluted sea fish.B．Sea fish will be polluted when you eat it next time.C．More and more sea fish will be polluted soon.D．Sea fish will be free from oil pollution.
A．How to find the way to exam polluted sea fish.
B．Sea fish will be polluted when you eat it next time.
C．More and more sea fish will be polluted soon.
D．Sea fish will be free from oil pollution.
单项选择题
Global warming only results from rapid increases in emissions of greenhouse gases.
A．Y
B．N
C．NG
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