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【单选题】
Jim cleaned his room and . [ ]A.
played guitar
B.
playing basketball
C.
played soccer
D.
plays the piano
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反馈参考答案：
举一反三
【单选题】薄板群钻的形状特点是,主切削刃磨成圆弧形,钻尖高度磨低,切削刃外缘磨成锋利的两个刀尖,与钻心尖相差(),形成三尖。
A.
0~0.5mm
B.
0.5~1.5mm
C.
1~2mm
D.
1.5~3mm
【单选题】Whether this will be your first or your thousandth business trip, you should be conscious of conduct that is considered proper during your absence from the office. As a representative of your company,...
A.
professionally
B.
lovely
C.
casually
D.
formally
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