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【单选题】
国际标准化组织规定,小于( )微米的固体悬浮物定义为粉尘。A.
75
B.
100
C.
45
D.
175
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皮皮学刷刷变学霸
举一反三
【简答题】以下各项中，（ ）是正确的期货的合约名称。
【简答题】Listen to five short conversations once and choose the best answers.
【单选题】Short conversations Listen to five short conversations and choose the best answer to each question you hear.
A.
What the man will do after graduation.
B.
Whether the job market is going to improve.
C.
Whether the man should go to graduate school.
D.
What the man should do in his last year of college.
【简答题】Listen to five short dialogs and choose the best answer to each question.
【简答题】Listen to five short conversations and choose the best answer to each question you hear
【单选题】直角曲杆OAB以角速度ω绕O轴转动，带动滑块M在水平槽内运动。若以M为动点，动系固结于OAB上，则该瞬时动点的牵连速度方向如何？
A.
垂直于OA向上
B.
垂直于AB向上
C.
垂直于OM向上
D.
沿OM向右
【单选题】根据支付结算法律制度的规定,下列各项关于支票提示付款的说法正确的是
A.
转账支票提示付款日期为出票日起 1 个月
B.
出票人记载自己为收款人,提示付款不予受理
C.
支票未记载收款人名称,可以提示付款
D.
现金支票仅限于收款人向付款人提示付款
【简答题】Listen to five short conversations and choose the best answer to each question you hear
【简答题】何为瞬时转动轴
【简答题】Short conversations Listen to five short conversations and choose the best answer to each question you hear.
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