题目内容

以淀粉胶、琼脂、或者琼脂凝胶、聚丙烯酰胺凝胶等作为支持物的区带电泳法称作( )

A. 凝胶电泳
B. 等电聚焦电泳
C. 毛细管电泳
D. 醋酸纤维素薄膜电泳

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下列不是区带电泳的是( )

A. 纸电泳
B. 醋酸纤维素薄膜电泳
C. 等电聚焦电泳
D. 聚丙烯酰胺凝胶电泳

The____ are about moving pictures.

A. programmes
B. programes
C. programms
D. program

Duringtheirfreetime,kidsintheUS___alotoftimewatchingtelevision,listeningtomusicorplayingcomputer

A. offer
B. spend
C. use
D. with

Thebooksintroduceustoalltheamazinganimals_____theworld.

A. out
B. up
C. around
D. in