填空题

The researchers decided to study the effects on breathing first because __________ might appear in a later period of time.

【参考答案】

other disorders
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填空题
______ are sharply criticized by some lawmakers because they let workers labor at Ground Zero with out satisfactory equipment.
单项选择题
A．At the information desk.B．On the platform.C．On the train.D．Near the stairs.
A．At the information desk.
B．On the platform.
C．On the train.
D．Near the stairs.
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