闸阀的安装姿态，根据闸阀的（）而定。A、结构 B、种类 C、材_爱下问搜题

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问题单项选择题

闸阀的安装姿态，根据闸阀的（）而定。

A、结构

B、种类

C、材质

D、设计要求

答案

参考答案：A

完形填空

完形填空。

Mary Smith 1 agirl. 2 is a student. 3 is 4 family name and Mary is her 5 name. Her 6 number is 806 -8027 and her ID number 7 8283928655. Her mother 8 a worker(1人). She and
9 mother 10 the same.

( )1. A. am
( )2. A. she
( )3. A. Mary
( )4. A. her
( )5. A. family
( )6. A.phone
( )7. A. is
( )8. A. are
( )9. A. her
( )10. A. look

B. are
B. She
B. Smith
B. she
B. last
B. ID
B. am
B. is
B. Her
B. look at

C. is
C. He
C. Mary Smith
C. she's
C. middle
C. bus
C. are
C. am
C. his
C. are

D. aren't
D. I
D. Smith Mary
D. his
D. first
D. card
D. am not
D. aren't
D. His
D. is

名词解释

表面能