水烧开的时候，壶盖不断“跳动”，这是由于[ ] A．壶盖在做功，内能转化为机械能

A

Music

Opera at Music Hall: 1243 Elm Street. The season runs June through August, with additional performances in March and September. The Opera honors Enjoy the Arts membership discounts. Phone: 241-2742. http://www.cityopera.com.

Chamber Orchestra: The Orchestra plays at Memorial Hall at 1406 Elm Street, which offers several concerts from March through June. Call 723-1182 for more information. http: //www.chamberorch.com.

Symphony Orchestra: At Music Hall and Riverbend. For ticket sales, call 381-3300. Regular season runs September through May at Music Hall in summer at Riverbend. http://www.symphony.org/home.asp.

College Conservatory of Music (CCM): Performances are on the main campus(校园) of the university, usually at Patricia Cobbett Theater. CCM organizes a variety of events, including performances by the well-known LaSalle Quartet, CCM’s Philharmonic Orchestra, and various groups of musicians presenting Baroque through modern music. Students with I.D. cards can attend the events for free. A free schedule of events for each term is available by calling the box office at 556-4183. http://www.ccm.uc.edu/events/calendar.

Riverbend Music Theater: 6295 Kellogg Ave. Large outdoor theater with the closest seats under cover (price difference).Big name shows all summer long! Phone:232-6220. http://www.riverbendmusic.com.

Which number should you call if you want to see an opera?（）

A.241-2742.

B.723-1182.

C.381-3300.

D.232-6220.

下列选项中，属于我国股份有限公司股东大会职权范围的是

A．下列选项中，属于我国股份有限公司股东大会职权范围的是

B．下列选项中，属于我国股份有限公司股东大会职权范围的是

C．下列选项中，属于我国股份有限公司股东大会职权范围的是

D．下列选项中，属于我国股份有限公司股东大会职权范围的是

表示挥发油中游离羧酸、酚类和酯类成分总量的指标是

A．酸值
B．酯值
C．皂化值
D．沸点
E．气相色谱相对保留值

重症肌无力病人出现危象时，其主要的临床征兆是（）。

A.眼球运动障碍

B.吞咽困难

C.构音障碍

D.呼吸肌无力，不能维持正常换气功能

E.四肢无力加重

设区的市级道路运输管理机构应当在网约车驾驶从业资格考核结束（）内公布考试成绩。

A、5日

B、10日

C、20日

D、30日