Each life preserver must be readily accessible to the person for whom it is intended while he or she is（）.

Each life preserver must be readily accessible to the person for whom it is intended while he or she is（）.

The（）enables water to be blow down or emptied from the boilerIt may be used when partially or completely emptying the boiler.

Virus Security Software is designed to detect, eliminate or quarantine computer viruses before they are able to harm a computer or server networked system.

is a category assigned to products or services having the same fimctional use but different technical characteristics. It is not same as quality.

is a category assigned to products or services having the same functional use but different technical characteristics. It is not same as quality.

（ ） is a category assigned to products or services having the same functional use but different technical characteristics. It is not same as quality.

Believe it or not, when first (introduce) ____ to Europe, tomato was thought to be poisonous.

Dunnage may be used to protect a cargo from loss or damage by（）.

A person ______ e-mail account is full won’t be able to send or receive any e-mails.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.