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【单选题】
生态文明建设的前提和关键是( )A.
人与自然和谐相处
B.
发展
C.
观念转变
D.
改善和优化人与自然的关系
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皮皮学刷刷变学霸
举一反三
【简答题】“在液为泪”的脏是（）。|“在液为涎”的脏是（）。A. 肝B. 心C. 脾D. 肺E. 肾
【单选题】Reading:The Iron Bridge 10. When was the bridge closed to traffic?
A.
1932
B.
1933
C.
1934
D.
1935
【简答题】“在液为涎”的脏是（ ）
【单选题】The iron bridge was only a heap of _____________ metal after the earthquake.
A.
turned
B.
distorted
C.
twitsted
D.
wrung
【简答题】The iron bridge was only a heap of _____ metal after the earthquake.(twist; distort; turn; wring)
【简答题】如图所示摇杆滑道机构中的滑块M 同时在固定的圆弧槽BC和摇杆OA 的滑道中滑动。如弧BC 的半径为R=0.5m，摇杆 OA的轴O在弧BC的圆周上。摇杆绕O轴以等角速度ω=4rad/s转动，当运动开始时，摇杆在水平位置。M点的加速度为（）。【图片】
【单选题】Reading:The Iron Bridge 11. When was a model of the bridge built?
A.
2000
B.
2001
C.
2002
D.
2003
【单选题】Reading:The Iron Bridge 12. There is no written evidence of how the original bridge was constructed.
A.
True
B.
False
C.
Not given
D.
I don't know
【单选题】Reading:The Iron Bridge 14. The painting shows that the bridge was constructed from the two banks.
A.
True
B.
False
C.
Not given
D.
I don't know
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