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【简答题】
在曲柄摇杆机构中,当取摇杆为件时,有 个死点位置。
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举一反三
【单选题】在溶剂的作用描述中,不正确的是:
A.
使反应分子能够分布均匀,增加分子间碰撞和接触的机会,有利于传热和散热。
B.
溶剂必须是易挥发的。
C.
溶剂应是惰性的,不能与反应物或生成物反应。
D.
溶剂可能影响化学反应的反应速度、反应方向、反应深度、产品构型等。
【简答题】Indeed, in the past five years, our productivity hit 3.5%, ______(超过) those magic years.
【简答题】The progress of our country in the past few years was indeed beyond belief.
【简答题】Indeed, in the past five years, our______________(生产力)hit 3.5%.
【单选题】Part II Reading Comprehension. Sushi ( 寿司 ) is no longer the sole preserve of the adventurous diner. These days, grabbing a pack forlunch is almost as common as picking up a cheese and sandwich. The J...
A.
Sushi makes a hit in the UK nowadays.
B.
Tesco is a giant supermarket selling Sushi only.
C.
British people prefer sushi to sandwiches and cheese.
D.
Sushi enjoys popularity only among adventurous diners.
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