A．无论多么强的刺激都不能引起反应 B．需要阈上刺激才能产生反应 C．不能再产生动作电位 D．阈下刺激也可以

A．keep their shoes on at home

B．never keep their shoes on at home

C．don’t wash the bath before using it

D．are very dirty and rude

When sailing in cold zones, the____ should be heated.

A.the steering gear room

B.the fire fighting pipe line

C.the fuel oil tank

D.the bath room

Home Fire Safety Precautions

It's a good idea for every home to have at least one multi-purpose fire extinguisher.

Keep one in plain sight in the kitchen, and consider others for the garage and for the workshop places where firefighters say fire is most (144) to occur.

Buy a dry chemical extinguisher rated for Type A, B and C fires.

This ABC rating (145) wood, paper and fiber fires, flammable liquids such as grease and petroleum products and electrical fires. (Type D is for chemical fires, less likely in the home.)

The gauge near the spout indicates how many pounds of chemical and pressure are left for use. Get the extinguisher recharged after any (146) use.

(44)

A．like

B．likelihood

C．likeness

D．likely

A、ruined

B、was ruined

C、had been ruined

D、having ruined

The new presidential home was painted white to ______.

A．cover the marks of fire

B．attract tourists from France

C．to please Mrs. John Adams

D．keep it warm in winter

She wants to () in the (), not shower.

A、bathe; bathe

B、bathe; bath

C、bath; bathe

D、bath; bath