题目内容（请给出正确答案）

[主观题]

All electrical appliances aboard a vessel should be grounded to ______.A.prevent them from

All electrical appliances aboard a vessel should be grounded to ______.

A.prevent them from falling when the vessel rolls

B.protect personnel from electrical shock

C.increase their operating efficiency

D.prevent unauthorized personnel from operating them

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更多“All electrical appliances aboa…”相关的问题

第1题

Although all application forms demand the same basic information,（）.

A.different companies may have different requirements

B.dfferent companies may take different ttudes toward them

C.appli ants may be required to answer all the questions in detail

D.pi ants may have to send in the toms by person

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第2题

All electrical goods sold in our shop will be ______ for one year.

A.guaranteed

B.protected

C.ensured

D.granted

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第3题

Electrical resistance is a common property of all materials, ______.A．only differs in degr

Electrical resistance is a common property of all materials, ______.

A．only differs in degree

B．only in degree it differs

C．differing only in degree

D．and differing in degree only

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第4题

All electrical circuits fall into one of ______ classes: series circuits, parallel circuits, and series parallel circuits.

A.four

B.two

C.three

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第5题

These results must be accurate, because all the calculations have been done by an（)co

These results must be accurate, because all the calculations have been done by an()

computer.

A)electric

B)electronic

C)electrical

D)electricity

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第6题

Electrical wiring on all "T-Boats" must be ______.A.concealed to prevent mechanical damage

Electrical wiring on all "T-Boats" must be ______.

A.concealed to prevent mechanical damage

B.concealed so the boat can be maintained more easily

C.protected from the weather

D.in an accessible place behind the ceiling

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第7题

腰肌劳损的物理疗法包括（Physical therapy for lumbar muscle strain includes)

A.按摩 (Massage)

B.超声波 (Ultrasound)

C.电肌肉刺激 (Electrical muscle stimulation)

D.以上均是 (The above are all correct)

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第8题

An electrical device which prevents an action from occurring until all other required cond

itions are met is called a/an _____.

A.limit

B.monitor

C.modulator

D.interlock

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第9题

腰肌劳损的物理疗法包括（Physical therapy for lumbar muscle strain includes)

A.按摩 (Massage)

B.超声波 (Ultrasound)

C.电肌肉刺激 (Electrical muscle stimulation)

D.以上均是 (The above are all correct)

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