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【单选题】
铰链四杆机构出现死点位置的前提条件是：（）A.
摇杆为主动件，曲柄为从动件
B.
曲柄为主动件，摇杆为从动件
C.
摇杆为主动件，滑块为从动件
D.
谁为主动件动都没关系
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【单选题】Research has found that teenagers are getting their driver's licenses later and doing less traditional work-for-pay than previous generations. But while they might not be tearing tickets at the local ...
A.
starting a popular YouTube channel from their bedroom
B.
tearing tickets at the local cineplex
C.
doing some forms of freelancing
D.
getting their driver's licenses
【单选题】(Unit 1) "Research has found that teenagers are doing less traditional work-for-pay than previous generations. But while they might not be tearing tickets at the local cineplex, they may be starting a...
A.
traditional work-for-pay
B.
freelancing
C.
tearing tickets at the local cineplex
D.
working 9 to 5
【单选题】The most probable meaning of the word 'opulence'(Para. 1) may be ______.
A.
technologies
B.
commercial means
C.
culture
D.
prosperity
【单选题】西亚地处 “ 五海三洲 ” 之地,下列说法正确的是
A.
西亚联系了亚洲、欧洲和南美洲
B.
“ 五海 ” 中里海是内陆湖泊
C.
西亚沟通了太平洋和大西洋
D.
苏伊士运河和霍尔木兹海峡是连接东西方的交通要道
【单选题】中东地处“五海三洲”之地,下列说法正确的是
A.
中东联系了亚洲、欧洲和南美洲
B.
“五海”中里海是内陆湖泊
C.
中东沟通了太平洋和大西洋
D.
苏伊士运河和霍尔木兹海峡是连接东西方的交通要道
【单选题】Research has found that teenagers are getting their driver's licenses later and doing less traditional work-for-pay than previous generations. But while they might not be tearing tickets at the local ...
A.
starting a popular YouTube channel from their bedroom
B.
tearing tickets at the local cineplex
C.
doing some forms of freelancing
D.
getting their driver's licenses
【单选题】俗话说“一个篱笆三个桩,一个好汉三个帮”, 团结有力量,团结能制胜。因此,我们要正确认识( )
A.
竞争的关系
B.
合作的关系
C.
一个人的成功完全依靠他人的帮助
D.
有利可图就合作，否则不合作
【单选题】"Research has found that teenagers are doing less traditional work-for-pay than previous generations. But while they might not be tearing tickets at the local cineplex, they may be starting a popular ...
A.
traditional work-for-pay
B.
freelancing
C.
tearing tickets at the local cineplex
D.
working 9 to 5
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