皮皮学，免费搜题
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【单选题】
渐开线直齿圆锥齿轮的 参数为标准参数A.
节点处
B.
C.
大端
D.
齿宽中点处
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】阅读理解。 It's 5:30 in the afternoon. School is over. It's time for student to relax. Look! Some boys are playing soccer and some are playing basketball on the playground (操场). Most girls don't like ball ...
【简答题】听录音，选单词。 1. Look! The pig has eyes. [ ] A. big B. small C. blue 2. —Where are you from? —I'm from . [ ] A. China B. Canada C. America 3. I have meal at 7:30 . [ ] A. pm B. am C. / 4. —L...
【简答题】( )是指企业(包括商家)与企业之间的一种电子商务模式。
【简答题】听句子，选出听到的内容。 ( ) 1. A. l ( ) 2. A. 3 kg ( ) 3. A. cow ( ) 4. A. look at ( ) 5. A. felt B. m B. 13 kg B. how B. look for B. failed C. n C. 30 kg C. now C. look like C. what
【简答题】Read and judge. 根据短文内容，判断下列句子是(T)否(F)正确。 It's 2:30 in the aftemoon. Look! We're having our P.E.class on our play-ground. Peter, John, Sam, Mark and I are playing basketball. Mary and Judy are skipping...
【简答题】阅读再判断正误。 It’s 5:30 in the afternoon. School is over. It’s time for student to relax. Look! Some boys are playing soccer and some are playing basketball on the playground(操场). Most girls don’t like bal...
【简答题】用适当的介词填空。 1. Look the hens. 2. I go school at 7:30 every morning. 3. Put your sweater. It's cold. 4. I want a pair shoes. 5. It's time lunch.
【单选题】(2011年考研真题)马克思把商品转换成货币称为“商品的惊险的跳跃”,“这个跳跃如果不成功,摔坏的不是商品,但一定是商品占有者”。这是因为只有商品变为货币( )
A.
货币才能转化为资本
B.
价值才能转化为使用价值
C.
抽象劳动才能转化为具体劳动
D.
私人劳动才能转化为社会劳动
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