单选

All theories,however,are tentative and are（ ）to criticism.

A immune B resistant C sensitive D subject

详情

单选

Although a natural alternative,such as honey,can be used to sweeten food if this

A current B substantial C present D essential

详情

单选

Although interior design has existed since the beginning of architecture,its dev

A consisted B contained C composed D comprised

详情

单选

Although there are disagreements over the definition of revolution,there is a st

A level B scale C degree D range

详情

单选

Although this child is only sixteen years old,he is so（ ）hundred dollars.

A thrifty B economical C financial D economic

详情

单选

American companies are evolving from mass‐production manufacturing to（ ）enterpri

A moveable B changing C flexible D varying

详情

单选

Americans are highly（ ）,and therefore may find it difficult to become deeply inv

A movable B moving C mobile D motional

详情

单选

Americans choose pasta,fruit,and vegetables,which supply them with carbohydrates

A sort B variety C kind D variation

详情

单选

Americans today have different eating habits than in the past.They have a broade

A food B diet C nutrition D hygiene

详情

单选

An expert system has as its base the collected knowledge of experts,the rules th

A by chance B so far C in essence D in addition

详情