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【单选题】
在下列形式的离合器中，弹簧压紧力在摩擦片允许的磨损范围内基本保持不变的是（）。A.
置弹簧离合器
B.
斜置弹簧离合器
C.
中央弹簧离合器
D.
膜片弹簧离合器
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反馈参考答案：
举一反三
【简答题】1851年“水晶宫”博览会之后，英国的（）倡导了“（）”
【多选题】简支梁受力发生弯曲变形,以下说法正确的有 。
A.
截面1-1和6-6的弯矩都为零
B.
截面2-2和3-3的弯矩相等
C.
截面4-4和5-5的弯矩不相等
D.
截面1-1和2-2的剪力相等
【单选题】听力原文： A British rower has set a record for the slowest-ever Atlantic crossing, coming ashore in southern England 124 days after leaving North America. The time was a disappointment, considering the 23...
A.
The fastest person to cross the Atlantic.
B.
The youngest person to row an ocean alone.
C.
The person who makes the fastest west-to-east crossing.
D.
The person who stays on the ocean for the longest time.
【单选题】简支梁受力如图,下列说法正确的是( )
A.
1-1截面的弯矩为零,3-3截面的弯矩为零;
B.
1-1截面的弯矩为-12kN.m,3-3截面的弯矩为零;
C.
1-1截面的弯矩为12kN.m,3-3截面的弯矩为零;
D.
3-3截面的弯矩不为零。
【单选题】简支梁受力如图,下列说法正确的是( )
A.
1-1截面的剪力与3-3截面的剪力相等;
B.
2-2截面的剪力与3-3截面的剪力相等;
C.
1-1截面的剪力与2-2截面的剪力相等;
D.
1-1截面、2-2截面、3-3截面的剪力均相等。
【简答题】April Fool's Day 1st April is a day __1__, / or you could easily __2__ someone. / The origin of the day is __3__ with the change / in the calendar in the 16th __4__, / which __5__ that 1st April was n...
【单选题】Luckily, the tower survived, and its tilt has made it an Italian icon, attracting visitors from all over who flock to Pisa to see one of the greatest architectural oddities in the world. __________ By...
A.
Yes, because it provides an important restatement of the main claim in the previous sentence.
B.
Yes, because it establishes an important shift in emphasis in the paragraph’s discussion about the tower’s tilt.
C.
No, because it interrupts the paragraph’s discussion with irrelevant information.
D.
No, because it repeats information that is already presented in the first paragraph.
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