_____at the result of the experiment, the professor did it again[ ]

What yourbrotherlike—He has small eyes and a small nose.

Researchers _______ to study mice from early ages but came across technical difficulties, so they weren’t sure they could expect clear results.

下列各句中，没有语病的一句是(　　)

The auto company succeeded in developing a new type of new energy vehicle, ________ countless failure.