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（）在食品检验结束后，所有样品都应冷冻保存。

A. 对
B. 错

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（）用于微生物检验的鲜蛋蛋液的样品在制备时，先将鲜蛋在流水下洗净，待干后再用95%的酒精棉球消毒蛋壳，然后根据检验要求，打开蛋壳取出蛋白、蛋黄或全蛋液，放入带有玻璃珠的灭菌瓶内，充分摇匀待检。

A. 对
B. 错

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Which of the following sentences is INCORRECT?

A. New machinery were introduced in the factory.
B. Poultry are very expensive in the city.
C. The police are investigating the murder.
D. The militia were called out to rescue flood victims.

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Nowadays, the iron and steel industry ________ an important part in our national economy.

A. plays
B. played
C. play
D. playing

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Mr. Wells, together with all the member of his family, ________ for Europe this afternoon.

A. are to leave
B. are leaving
C. is leaving
D. leave

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（）在食品检验结束后，所有样品都应冷冻保存。

A. 对 B. 错

（）用于微生物检验的鲜蛋蛋液的样品在制备时，先将鲜蛋在流水下洗净，待干后再用95%的酒精棉球消毒蛋壳，然后根据检验要求，打开蛋壳取出蛋白、蛋黄或全蛋液，放入带有玻璃珠的灭菌瓶内，充分摇匀待检。

Which of the following sentences is INCORRECT?

Nowadays, the iron and steel industry ________ an important part in our national economy.

Mr. Wells, together with all the member of his family, ________ for Europe this afternoon.

A. 对
B. 错