LTE下行采用了哪些多天线技术：（）A.SFBC B.FSTD C.波束赋形

--Dad, our class won the first in the sports meeting.

---             .

A．Congratulations!

B．Good luck.

C．That's interesting.

D．Nothing serious.

—Hi, Sam . We're going for a walk. Would you like to _______?  

—Great! Let's go.    [ ]

A. come along

B. come on

C. come out

D. come up

携带式灯具的供电电压不应超过（）伏。

A.220

B.380

C.110

D.36

膀胱肿瘤中最常见的为下列哪种（）

A.移行细胞癌

B.腺癌

C.鳞状细胞癌

D.横纹肌肉瘤

E.嗜铬细胞瘤

对于双排喷水室，喷嘴应采用的布置方式是( )。

A．一顺一逆
B．两排顺喷
C．两排逆喷
D．对喷