彩色多普勒技术不可以与下列哪种技术并用（）

A.二维超声显像

B.频谱多普勒

C.心脏超声造影

D.M型超声心动图

E.以上都不是

－I’m new here. Could you please tell me _______?

－Sure. It’s over there behind that tower.

A．where the youth centre is

B．when the library opens

C．how far is the amusement park

D．how can I get to the underground station