I _________ little time to get ready for the test, so I wasn’t confident at that time.

A．gave

B．was given

C．didn’t give

D．wasn’t given

心电图检查时，通常采用的走纸速度是（）

A.10mm/s

B.25mm/s

C.50mm/s

D.100mm/s

E.40mm/s