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问题 单项选择题

有关干啰音的叙述，正确的是

A．哨笛音又称喘鸣音
B．根据音调高低可分为高、中、低调三种
C．高调干啰音多起源于较小的支气管或细支气管，又称哨笛音
D．哨笛音用力吸气时其音质呈上升性
E．鼾音调高，其频率为100～200Hz

答案

参考答案：C

填空题

扇形的圆心角为60°，半径为5，则扇形的面积为______．
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填空题

短文填词。

     As we all know, most of the students feel nervous when taking an exam. There is no 1. ________ (疑问)

that exams are important to us, but it's 2. m________ important to have a right attitude towards them. As a

matter of fact, exams are no more than 3. ________ means of evaluating. Why worry about the results? Only

4. ________ studying hard every day and 5. ________ (准备) for exams in advance can we avoid suffering

from the 6. ________ (压力) of exams. We'd better go out for a walk 7. ________ do some outdoor exercise

before exams. Besides, having enough sleep can 8. f________ us with energy and make it possible for us to

9. ________ well in the exam. A hot bath or a cup of hot milk may help those 10. ________ (感觉) stressed

out before an exam.

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