This is         3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?

A.a(chǎn)B.a(chǎn)nC.theD./

練習(xí)冊系列答案
相關(guān)習(xí)題

科目:初中英語 來源: 題型:單選題

Red and white are     good match, as      powerful red balances     calm white.

A.a(chǎn), /, /B./, a, aC.the, a, /D.a(chǎn), the, the

查看答案和解析>>

科目:初中英語 來源: 題型:單選題

Lucy is __________ honest girl. And she is __________ student in our class

A.a(chǎn), the B.a(chǎn)n, a C.the, a D.a(chǎn), a 

查看答案和解析>>

科目:初中英語 來源: 題型:單選題

Susan is_________American girl

A.a(chǎn)B.a(chǎn)nC.theD.不填

查看答案和解析>>

科目:初中英語 來源: 題型:單選題

He is_____American. I’m_____English.

A.a(chǎn),aB.a(chǎn)n,aC.the,theD./,/

查看答案和解析>>

科目:初中英語 來源: 題型:單選題

The boys don’t know ___________.

A.how do they swim B.how swim
C.they how swimD.how to swim

查看答案和解析>>

科目:初中英語 來源: 題型:單選題

I don’t know       with this problem.It’s too hard.

A.which to do B.when to do C.what to deal D.how to deal 

查看答案和解析>>

科目:初中英語 來源: 題型:單選題

My cousin Andy can play        piano very well, but he isn’t god at playing         basketball.

A.the; the B./; the C.the; / D./; / 

查看答案和解析>>

科目:初中英語 來源: 題型:單選題

        man in a black hat is my PE teacher. He often plays        football with us.

A.A; the B.The; a C.The; / D.A; /

查看答案和解析>>

同步練習(xí)冊答案