摘要: must stay here and wait for . A. I , he B. We , them C. I , their D. Us , they

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 Laboratory work is your chance to learn science firsthand. It can be fun but you must be careful to prevent injury. Listen closely when your teacher reads and explains the rules before your first lab lesson.

    LABORATORYRULES

    Throughout the lesson

    ·Do not enter the science lab without the teacher’s permission.·No food or drinks are to be alowed in the science lab.

    Before the Experiment

    ·Read al instructions carefuly before every experiment.

    ·Prepare al apparatus(仪器)and arrange them so that you wil not knock them over while doing the experiment.

    During the Experiment

    ·If you are unsure of how to use any apparatus or how to operate, ask your teacher for help.·Never smel or taste chemicals unless your teacher gives permission.

    After the Experiment

    ·Wash al apparatus after use and return them to the places where they were.

    ·Throw waste materials in proper waste baskets.    First Aid    

    ·Report al accidents to your teacher immediately.

    ·If you spil( 溅 出 )any chemicals onto your body or clothing, wash with plenty of water and report to your teacher.

   1. Your teacher wil probably tel you the rules above _____ the first lab lesson.

    A. before     B. since    C. during    D. after

2. Before every experiment, you should _____.

    A. taste the chemicals first

    B. clean al the apparatus

    C. read al instructions carefuly

    D. report al the accidents to the teacher

  3. When you are not sure how to use al apparatus, _____.

    A. try them on your own

    B. read the rules carefuly

    C. ask your teacher for help

    d. put them back

 4. It is clear that you can _____.

    A.  bring food into the lab

    B. enter the lab anytime

    C. smel chemicals as you like

    D. learn science directly in the lab

    5. If you get chemicals on the clothing, you can find ways to solve it in the part _____.

    A. Before the Experiment

    B. First Aid

    C. During the Experiment

    D. After the Experiment

 

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完形填空

  Sea lions are mostly found on sandy beaches and around rocks all around the world,but mostly in Australia.Sea lions eat fish and some   1   animals in the ocean.It can be quite dark in the ocean,  2   sea lions can find their way around.Sea lions are good   3  .They can dive(潜水)35 feet or deeper.If they dive too deep,they can run out of air and   4   in the water.

  Sea lions are great swimmers,too.They can   5   at a speed of 40 kilometres an hour.This helps them   6   away from whales and sharks,but not from human beings(人类)!  7   year a lot of sea lions die painfully.Thousands of sea lions were killed   8   their skin and oil.That's   9   bad.A sea lion is a very beautiful animal!We need to keep this animal alive,always and forever!And we must   10   them from disappearing in the world or our grandchildren may have no chance to see them any more.

(1)

[  ]

A.

sour

B.

small

C.

bad

D.

orange

(2)

[  ]

A.

and

B.

but

C.

so

D.

or

(3)

[  ]

A.

runners

B.

drivers

C.

divers

D.

swimmers

(4)

[  ]

A.

work

B.

sleep

C.

live

D.

die

(5)

[  ]

A.

swim

B.

get

C.

leave

D.

grow

(6)

[  ]

A.

walk

B.

run

C.

take

D.

look

(7)

[  ]

A.

Each

B.

Another

C.

The

D.

That

(8)

[  ]

A.

to

B.

for

C.

with

D.

on

(9)

[  ]

A.

only

B.

not

C.

really

D.

just

(10)

[  ]

A.

clean

B.

found

C.

discover

D.

protect

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