问题
选择题
数a的2倍与3的和，可列代数式为[ ]
A．2（a+3）
B．2a+3
C．3a﹣2
D．3（a+2）
答案
答案：B
搜题请搜索小程序“爱下问搜题”
数a的2倍与3的和，可列代数式为[ ]
A．2（a+3）
B．2a+3
C．3a﹣2
D．3（a+2）
答案：B
Passage Three
What would happen to some countries if tourism stopped
A．Their economies would be ruined.
B．It would keep their economies going.
C．There would be no more environmental pollution there.
D．People have no chance to travel there.