搜题请搜索小程序“爱下问搜题”
问题 单项选择题

某蛋白质由4条肽链组成，共含有109个肽键，则此蛋白质分子中至少含有—NH2和—COOH个数及氨基酸数分别为（）个

A.105，105，105

B.110，110，110

C.4，4，113

D.1，1，113

答案

参考答案：C

选择题

计算：-28x4y2÷7x3y=（    ）。
查看答案
单项选择题

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.

When can you go to a concert by Chamber Orchestra?（）

A.February.

B.May.

C.August.

D.November.
查看答案