下列关于美国总统的叙述，不正确的是  

A．总统是国家元首

B．总统是政府首脑

C．总统经参议院同意有权任命联邦法院大法官

D．总统由选民直接选出，任期四年

When we announced Java 2 Micro Edition (J2ME) a few years ago, we believed that Java had an important role to play in hand held devices. Some were (66) that Java would be small enough for such limited devices. But no (67) , Java for the small device is a success. J2ME has emerged ply in the wireless market. Java’s portability and extensibility have brought about rapid (68) in this market. The success of Java beyond desktop computers is significant (69) developers. Java literacy is now more important than ever, as Java is used more and more to (70) a whole range of new computing devices—not only wireless handsets but also personal digital assistants, cameras, automobiles, home control, and so on.

（66）处填（）。

A．skeptical

B．think

C．believe

D．approve