Lab Rat is a computer application
A．for science experts to ask and discuss scientific questions.
B．for science experts to show how experiments are done.
C．for children to show off their knowledge about scientific questions.
D．for children to enquire answers about scientific questions.

A.for
B.
B．for
C.
C．for
D.
D．for
E.


【参考答案】

D
在谈到applications(应用程序)时，男士谈到他们有一个名为LabRat的应用程序，它能让孩子提问和......

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