舌隆突的位置处于
A．切牙的舌面
B．上颌第一磨牙的舌面
C．位于前牙舌面颈1/3处
D．切牙和尖牙颈部舌侧的隆起
E．牙釉质的长形隆起
参考答案：C
用所给动词的适当形式填空。
1. By the end of last year, the famous writer _____ (write) 20 books.
2. When we _____ (get) to the cinema, the film _____ (on) for half an hour.
3. Before he _____ (come) here, he _____ (live) in Britain for ten years.
4. By the time I _____ (arrive), she _____ (leave).
5. I _____ (learn) a lot of English songs before I _____ (be) ten.
（）存放待执行指令的地址。
A.算术逻辑单元
B.程序计数器
C.指令寄存器
D.累加器
