下列疾病中，属于择期手术的是（）。 A.消化道穿孔 B.甲状腺功能亢进 C.胃癌 D

Questions 14-23

·Look at the ten statements for this part.
·You will hear a passage about "A Research on Sleep ". You will listen to it twice.
·Decide whetheryou think each statement is right(R), wrong(W) or not mentioned(NM).
·Mark your answers on the Answer Sheet.

The lower your stage of sleep, the slower your brain waves will be.

A．Right

B．Wrong

C．Not Mentioned

不动产：指不能够移动或如经移动即会损害其经济效用和经济价值的物。据此定义，下列属于不动产的是( )

A．冰箱

B．树木

C．汽车

D．家具

诊断小儿急性喉炎的依据主要是（）。

A.主诉

B.临床表现

C.喉镜检查结果

D.咽喉涂片

E.喉作X线侧位片

R是指。（）

A.扬声器的电功率

B.扬声器到听音乐的距离

C.空间某点的高压级

D.扬声器的输出声压级

Mary invested $8,400 for 6 months in a certificate of deposit paying  percent simple annual interest. How much more interest would Mary have received if the interest rate on this certificate had been 9  percent simple annual interest ？（）