61.export A.bagstha...
问题详情:
61. export A. bags that people take with them when they travel
62. baggage B. to try extremely hard to achieve something
63. expand C. to become larger in size, number or amount
64. outspoken D. a short informal test
65. welfare E. happiness and health of people
66. bond F. on or onto a ship, plane, bus or train
67. project G. task that requires a lot of time and effort
68. aboard H. close connection that people have with each other
69. quiz I. giving opinions openly and honestly
70. struggle J. to send things to foreign countries for sale
【回答】
JACIE HGFDB
知识点:其他
题型:未分类
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在恒温、体积为2L的密闭容器中进行反应:2A(g)⇌3B(g)+C(g),若反应物在前20sA物质由3mol降...
问题详情:在恒温、体积为2L的密闭容器中进行反应:2A(g)⇌3B(g)+C(g),若反应物在前20sA物质由3mol降为1.8mol,则前20s的平均反应速度为()A.v(B)=0.03mol/(L•s)B.v(B)=0.045mol/(L•s)C.v(C)=0.03mol/(L•s)D.v(C)=0.06mol/(L•s)【回答】考点:化学反应速率和化学计量数的关系.专题:化学反应速率专...
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