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使用砂轮片打磨时，用砂轮的_____面接触，打磨效果最佳

A. 1/2
B. 1/3
C. 2/3
D. 全部

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正确的手锤敲击方法是_____。

A. 用手腕作圆周运动
B. 用手肘作圆周运动
C. 用手腕作直上直下运动
D. 用手肘作直上直下运动

Choose the proper sentences to fill in the blanks in the dialogue.选择合适的句子补全对话。Yuyi: Hi! I’m Shen Yuyi, a secretary in this company. Are you new here?Ella: 1)___ Ms Yuyi. Yes. I’m Ella Baker. You can call me Ella.Yuyi: Nice to meet you, Ella. 2)_Yuyi is my given name, and Shen is my family name.Ella: Oh! 3)_ Ms Shen.Yuyi: It’s OK. 4)_Ella: I’m from Liverpool, a city in England. 5)___Yuyi: I’m from Hangzhou, a city in Zhejiang Province.A. Sorry!B. By the way,C. Excuse me.D. What about you?E. Nice to meet you.F. Where are you from?G. My last name is Baker.

Ella: Could you tell me something about your family?Yuchen: Sure. 1)___Ella: He’s very strong. Is he a football player?Yuchen: No. 2)_ He manages a department. But he likes playing football.Ella: Who is this baby in your mother’s arms? 3)_Yuchen: No, it’s my sister. 4)_Ella: I see. And this little boy must be you.Yuchen: Bingo! 5)___

当经济处于繁荣时期,社会总需求明显大于社会总供始时,政府进行宏观调控所应选择的宏观经济政策是( )。

A. 扩张性财政政策与紧缩性货币政策
B. 扩张性财政政策与扩张性货币政策
C. 紧缩性财政政策与紧缩性货币政策
D. 紧缩性财政政策与扩张性货币政策