[填空题]
An electron is limited to tracow6- qr2yk3 3 p+rykevel at sk r x* -n/e/z d b6)aqi/;6iuqwp+ygnypeeds less than c. Does this put an upper limit on the momentum of an edyanig pqw6uk-y e *;x6+nz/ /b)qir/ lectron? If so, what is this upper limit? If not, explain.
