下列不属于系统软件的是A．UNIX B．QBASIC C．Excel D．

— Pay you weekly or monthly?

—       . Either is OK.

A．Thank goodness

B．Let’s get going

C．It’s up to you

D．That’s all right

试述感受器的生理特性。

淋巴道转移可表现为（）。

A.区域性转移

B.跳跃式转移

C.桔皮样外观

D.卫星结节

E.炎症表现

One important difference is that an ActiveX control must be (74) for a specific platform, while an applet is platform-independent.

A．transactioned

B．compiled

C．created

D．identitied

受遗传因素或环境因素的影响，胚胎发育过程________未融合或融合不全，可以导致唇裂的发生。