— Do you have the time?

— Sorry, I have no watch.

— ____

A．What a shame!

B．Thanks anyway.

C．It doesn’t matter.

D．Why not buy one?

变异型心绞痛发作时，心电图的改变为（）

A.有关导联ST段降低

B.有关导联ST段抬高

C.有关导联原来倒置的T波变直立

D.有关导联T波倒置

E.有关导联T波低平