同一债权既有保证又有物的担保，如果债务人不履行债务，则( )。A．应优先执行保证

阅读短文，根据短文内容回答问题。

Ants may be very tinny, but they’re serious eaters! Ants love a picnic and they have their “ant-picnics”.

Favorite Foods

Want to find out what the ants like to eat? Place different foods on the edge of an upside-down plate. You can use butter, honey or seeds. Put this feeding station in the places where there are lots of ants. Wait three minutes and count the number of ants feeding on each food. Count them every three minutes. Watch and find out!

Do ants prefer sweet foods or less sweet ones? Here’s test: Give ants a choice between full-strength honey and a honey-water mixture. Offer a few drops of each choice side-by-side. Then count the number of ants you see near each site every three minutes.

How Far Will They Go?

Want to see how far ants travel to collect food? First find an ant nest(巢) by following some ants when they carry food home. Now you know how far the ants traveled to your food station. Next, move the food station about one foot (30cm) farther. Keep moving it until the ants no longer show up.

Spreading the News

Once ants find food they like, usually they try to get their nestmates to help. To find out how long it takes an ant to tell others there’s food nearby, offer their favorite food and watch. After the first ant finds it, begin counting the ants at the food station every minute. Also, watch their behavior, when the first ant heads home, what does it do when it gets near other nestmates?

小题1:Do ants love a picnic?

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小题2:Where can we put the feeding station to find out ants’ favorite food?

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小题3:How can we find an ant nest?

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小题4:What do ants usually do once they find food they like?

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小题5:What is the passage mainly about?

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中银行人民币单位银行结算账户集中上收复审管理办法适用于人民币单位银行结算账户的（）。

A.开立

B.变更

C.撤销

D.使用

汇率的标价分为直接标价法和间接标价法，下面两种牌价分别属于哪种标价法？（）伦敦外汇市场的汇率：1英镑=1.7529美元中国银行公布的外汇牌价：100港币=103.72人民币

A.直接标价法、间接标价法

B.B.间接标价法、直接标价法

C.直接标价法、直接标价法

D.间接标价法、间接标价法

新产业革命，亦称第四次产业革命，是指从20世纪50年代开始的一场以信息技术为核心，包括微电子技术、通信技术、生物工程、激光、光导纤维、机器人和新的合成材料以及海洋开发等新的技术革命。下列属于新产业革命的是( )。

A．北京大学总结前三次教学改革的经验，从今年秋季开始第四次教学改革

B．随着我国新农村建设步伐加快，全国农村电网改造基本完成

C．为了公司能通过IS09002质量体系认证，公司员工努力工作，创造佳绩

D．随着电子技术的发展，我国各大城市都基本上普及了宽带网络

轧辊车削时不同心，在轧制时可造成辊跳现象。