填空题

Generally, complex computer models can successfully predict El Nino

【参考答案】

in advance 12 to 18 months
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单项选择题
A．She is busy at work.B．She is resting in bed.C．She has to go out of town on business.D．She lets her husband experience the cook.
A．She is busy at work.
B．She is resting in bed.
C．She has to go out of town on business.
D．She lets her husband experience the cook.
填空题
El Nino occurs irregularly and we sometimes can ______.
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