付款人承兑商业汇票，不得附有条件，承兑附有条件的，票据无效。( )
参考答案：错
解析： 付款人承兑商业汇票，不得附有条件，承兑附有条件的，视为拒绝承兑。
请围绕“低碳环保”这一话题，写一组句子，至少运用两种修辞。（2分）
—Why did Miss Yang look so worried when we saw her?
—Because she wondered __________.
A．where did the other students go
B．when would the policeman come
C．what her students have done during the trip
D．if her students had survived the earthquake
