Why does an astronaut put his hand under his belt when he sleeps？ 查看材料

A . Because she enjoyed taking fancy pictures of dogs. B . Because she was a faithful antismoking campaigner. C . Because she wanted to make their adoption quick and enjoyable. D . Because she felt relieved to make them look attractive and stylish.

A . To earn money for sch001． B . To keep his yard nice． C . To be able to work outdoors． D . To get exercise while working．

A . The DML operations re-create the Bitmap index blocks. B . The Bitmap index is rebuilt automatically after a DML operation. C . The smallest amount of a bitmap that can be locked is a bitmap segment. D . Additional time is taken to remove NULL values from the Bitmap index after a DML operation.

A . The $VAR variable was not exported B . The $VAR should have been set as VAR C . dog needs double quotes around it when setting $VAR D . The { } should not be around VAR in the echo command

A．The professor think it is potential to make things which we love tree treasure if days gone. B．The professor think we can make things true treasure if days gone. C．The professor think we should buy expensive things. D．The professor like to buy antique.

A．To earn money for school. B．To keep his family's yard looking nice. C．To he able to work outdoors. D．To get exercise while working.

A．Because it was built as a lean tower. B．Because it was built on soft ground. C．We don't know.

A．Because she wants to play a camp with Mary. B．Because she wants to enjoy the sunshine with Mary. C．Because she wants to introduce a new drink to Mary. D．Because she wants to share her drink with Mary.

A．Consumers buy more goods when prices are high B．Producers want to sell all of their goods C．Producers make more goods when prices are high D．Consumers will not buy all of the goods

A．She does not know where to have the party. B．She does not know what to do at the party. C．She does not know when to attend the party.

A．To detect the direction of the sound. B．To detect the direction of the vibrations. C．To hear more clearly. D．To better sense the vibration.

A.are B.is C.were D.be

A.To help his students learn English． B.To make his students work harder． C.To give his students some advice．

A.She’s come back from a Vacation． B.She’s rested for two days． C.She’s been exercising．

A．Because they adopt the “first-past-the-post election system” B．Because it is easier to get votes in big states C．Because the winner of the plurality gets all of that state electoral votes D．Because the citizens in big states can vote the president directly