The experiment has failed and we will have to repeat it.

The experiment has failed and we will have to repeat it.
a对b错
The evidence in that journal article strongly supports the proposition here.
a对b错
The engine might have slid under the housing if the base could have been made more even.
a对b错
Prior to malfunctioning,the machine _________ a loud cracking noise,then wisps of smoke rose from the casing.
a.are making b.had made c.will make
The calculation of free space radiation modes for vibrating structures will be presented in Borgiotti .
a对b错
They step carefully over the numerous sharp obstacles before they reached the malfunctioning equipment.
a对b错
The vehicles crashes into the crowd.
a对b错
Lack of technical expertise _____ that at present commercialisation of some active noise control systems is limited
.a.meant b.is meaning c.means d.meaning
They would of if they could of.
a对b错
Several researchers _______ that the material is extremely volatile when heated.a.have demonstrated b.has demonstrating c.have demonstrate d.has demonstrate
The prototype ____ the specifications when it was presented last year.
a.meets b.will meet c.met
The material in that article has been wrongly interpreted in this paper.
a对b错
Last year many developments in satellite technology _____.
a.occurring b.will occur c.occurs d.was occurred e.occurred
Efficiency in bending depending primarily on the shape of the cross section.
a对b错