单元自测4（10分）

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一、选择填空：阅读下面的对话或句子，从A、B、C三个选项中选出一个能填入空白处的最佳选项。

1.— Do you prefer a portableor a clumsy3D printer

— .

A.No, a portable 3D printer is more useful.

B.Yes, Iwould not have a clumsy one.

C.I prefer a portableone to a clumsy one.

2.—They are testing the 3D printer. Don’t you come and see it

—What

A.Where is it displayed

B.It really matters.

C.That’s fine.

3.—Do youlike that technology exhibition

— Yes, Ilike it very much. .

A.It finally comes true.

B.It shows me the impressive magic power of 3D printing.

C.It is a good chance.

4.3D printing is just at the beginning stage. It is not ____.

A.mature

B.ripe

C.grown

5.Someone invented the 3D printer many years ago, ____ I don’t remember who.

A.so

B.but

C.only

6.二、阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。

（课外资料）

In the grass, ababyduck was hatched (孵化) out in a collegebiology lab with a backward left foot. At the time, itprobably wouldn’t have survived,ifMike Garydidn’t recommend a proper operation to cut off that bad foot.

Months after the healing process, engineers at Novacopy Company produced a 3D printedmodelthat would be used to create a prosthetic(修复的)foot forthe duck. Considering that ABS plastics werenot flexible enough for this type of exercise, the Novacopy company made a three-dimensionally modeled foot made of silicone,with the hope to create a permanentprosthesis(假肢)for the duck.

It took just 13 hours to produce. This 3D prosthesis demonstrated the 3Dtechnologies canbe used not only for human application, but also in foreign subjects such as animals and other medical treatments.

Where was the baby duck hatched out 1

A. In acollegebiology lab.

B. In a back yard.

C. In Noacopy Company.

2. Whatwas wrong with the babyduck 2

A. It didn’t survived.

B. It was born with a backward left foot.

C. Mike Garycut off that bad foot.

3.Could ABS plastics be used toproduce a 3D printedmodelthat would be used to create a prostheticfoot forthe duck 3

A. No, because ABS plastics werenot flexible enough.

B. Yes, but it could only be produced by Novacopy Company.

C. Yes, because it was made of silicone.

4. How long did it take to create a permanentprosthesis for the duck 4

A. 10 hours.

B. 13 hours.

C. 30 hours.

5. What did the last sentence of this passage indicate 5

A.3Dtechnologies canbe used only for human application.

B. 3Dtechnologies canbe used only forforeigners.

C. 3D technologiescanbe used tohuman, animals and other medical treatments.

(1).__1__

A.A

B.B

C.C

(2).__2__

A.A

B.B

C.C

(3).__3__

A.A

B.B

C.C

(4).__4__

A.A

B.B

C.C

(5).__5__

A.A

B.B

C.C