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【简答题】
解不等式 3x-4 6 ≤ 2x-1 3 ，并把它的在数轴上表示出来．
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举一反三
【单选题】下列机构：1）对心曲柄滑块机构，2）偏置曲柄滑块机构，3）平行双曲柄机构，4）摆动导杆机构，5）曲柄摇块机构，当原动件均为曲柄时，具有急回运动特性的有（ ）。
A.
2个
B.
3个
C.
4个
D.
5个
【简答题】插花艺术的造型基本原则?
【单选题】It could not be ruled out that, sooner or later, the country would break out of the treaty.
A.
confirmed
B.
tolerated
C.
excluded
D.
refuted
【单选题】The ratio between payments into and out of a country is known as the country's balance of payments. Besides the value of imports, and exports (the balance of trade), the balance of payments includes p...
A.
specificity
B.
accuracy
C.
ability to predict future trends
D.
comprehensiveness
【单选题】If they were not bumped, the non-stop flight would take them to Providenciales at ( )
A.
about 1:00 pm
B.
about 8:30 pm
C.
about 10:05 am
D.
about 12:00 noon
【单选题】下列各机构中: 1) 对心曲柄滑块机构、 2) 偏心曲柄滑块机构、 3) 转动导杆机构、 4) 摆动导杆机构、 5) 曲柄摇杆机构,当原动件均为曲柄时,上述机构中有 具有急回运动特性。
A.
2个
B.
3个
C.
4个
D.
5个
【单选题】下列机构: 1)对心曲柄滑块机构,2)偏置曲柄滑块机构,3)平行双曲柄机构,4)摆动导杆机构,5)曲柄摇块机构,当原动件均为曲柄时,上述多少个机构有急回运动特性?( )
A.
2个
B.
3个
C.
4个
D.
5个
【单选题】下列机构: 1)对心曲柄滑块机构,2)偏置曲柄滑块机构,3)平行双曲柄机构,4)摆动导杆机构,5)曲柄摇块机构,当原动件均为曲柄时,具有急回运动特性的有( )。
A.
5个
B.
4个
C.
3个
D.
2个
【单选题】The ratio between payments into and out of a country is known as the country's balance of payments. Besides the value of imports and exports (the balance of trade), the balance of payments includes pr...
A.
specificity.
B.
accuracy.
C.
usefulness.
D.
comprehensiveness.
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