玉米是耐连作作物，而大豆是不耐连作作物。
参考答案：对
The expo is being held in Shanghai, _______a lot of advanced technology is shown for the first time.
A．why
B．which
C．when
D．where
你觉得《竹林深处人家》里哪些语句写得美妙？妙在何处？
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