题目内容

下列哪种情况下简谐振子振动的角频率将保持不变？

A. 改变振子的初始位置
B. 改变振子的初始速度
C. 同时改变振子的初始速度和初始位置
D. 以上情况下振子的角频率都不变

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用旋转矢量法描述简谐振动时，旋转矢量与x轴直接的夹角为振子振动的

A. 振幅
B. 相位
C. 初相
D. 角频率

在同一个周期内，简谐振子的相位与振动状态一一对应。

A. 对
B. 错

Work in pairs. Read the text again and arrange the statements in proper order.1.By actively searching for topics that relate to your company, you may be able to get an inside track on having your answer highlighted above other answers if others vote you up.( )2.Facebook continues to grow the personal aspect of profiles and the recentprofile change on December 5thcontinues to show Facebook’s dedication to “tell a story about yourself.”( )3.Facebook places allow friends to share their location (and your business) among other friends, and can help boost your visibility.( )4.Users can respond to an event by confirming, declining, or offering a “maybe” to the host.( )5.Facebook page wall posts have beenreported to have a CTR of 6.49%showing the power of this type of messaging.( )6.For ads that promote Facebook pages, users can like the page directly in the ad, and for those ads that are promoting events allow users to respond within the ad itself.( )7.The marketing potential for Facebook groups is much lower than Facebook Pages but can be effective in specific scenarios.( )

米哈伊诺夫斯基承认陀思妥耶夫斯基的天才地位,但却不认同其对“残酷”的刻画的合理性。()

A. 对
B. 错