Security devices at airports are ______ to spot weapons that could be used by terrorists.
A：pretended
B：intended
C：demanded
D：declined
A man says to his friend，"Guess how many coins(硬币) I have in my pocket(兜). "
The friend says. "If(如果) I guess right，will you give me one of them？"
The man says，"If you guess right，I'll give you both(两个都) of them. "
争先恐后：____ ____ ____
无遮无拦：____ ____ ____
2016年3月，第十二届全国人大第上次会议表决通过了第十三个国民经济和社会发展五年规划纲要，通过的首部 将于9月1日起施行。（ ）
