下列哪项不是PC-MRA的适应证（）A.显示脑动脉瘤 B.心脏血流分析 C.静脉病变

动词填空  用所给动词的适当形式填空。

1. My father usually ______(watch) TV in the evening.

2. Look. The students ______(play) basketball over there.

3. We enjoy ______(live) in the city very much.

4. —______ they ______(go) to the beach yesterday?

    —No, they didn't. They _____(go) to the park.

5. I ______(be) born on July 23rd, 1991.

6. Charles Smith started ______(hiccup) in 1922.

7. Lucy ______(invite) her friends to her party next Sunday.

目前，临床上应用最为成熟的分子影像技术是（）。

A.fMRI成像

B.¹⁸F-FDGPET/CT显像

C.PerfusionCT显像

D.近红外光学成像

E.超声分子成像

He is ready to help others, seldom, ______ refusing them when they turn to him.[ ]

A. if never        

B. if ever        

C. if not      

D. if any

乘务员进行旅客广播，需按数字键：（）

A、2

B、5

C、8

D、*

增强型全速率话务信道采用的编码方案是（）。

A.13kbt/sRPE-LTP

B.6.5kbit/sCELPC

C.13kbt/sCELPC

D.6.5kbit/sRPE-LTP