设[H, °]和[K, °]是群[G, °]的子群，下面那个代数系统一定是[G, °]的子群
未知类型：{'options': ['[HK, °]，HK={hk| h∈H ∧ k∈K}', '[H∩K, °]', '[H-K, °]', '[K-H, °]'], 'type': 102}
未知类型：{'options': ['[HK, °]，HK={hk| h∈H ∧ k∈K}', '[H∩K, °]', '[H-K, °]', '[K-H, °]'], 'type': 102}
举一反三
- 设[H, ∗]，[K, ∗]是群[G, ∗]的子群，下面那个代数系统也是[G, ∗]的子群 未知类型：{'options': ['[H-K, ∗]', '[H∪K, ∗]', '[H∩K, ∗]', '[H-K, ∗]'], 'type': 102}
- Compute H−− with respect to point A where H−−=[I][ω] and [ω]T=[ωxωyωz]. Please answer using m, L, ϕ, and ω. Note that m is a point mass.H=i^:______ j^:______ k^:______
- 目前临床型磁共振成像获得图像基于的质子是（）。 未知类型：{'options': ['[sup]1[/]H', '[sup]31[/]P', '[sup]23[/]N', '[sup]18[/]F', '[sup]131[/]H'], 'type': 102}
- The 3rd homeworkListen to the following, spell the words in English and translate into Chinese._________________ [ʃeip]• _________________['traiæŋɡl]• ____________[raund]• _______________ ['əuvl]• _______________ [hɑ:t]• _______________ [stɑ:(r)]• _______________ [riŋ]• _______________ [ˈrektæŋɡl]• __________[skweə(r)]• _______________ ['daiəmənd]• _______________ [kju:b]• _______________ [kəʊn]_______________ ['kʌlə(r)]• _______________ [(h)wait] _______________ [blæk]• _______________ ['jeləu] _______________ [ɡri:n]• _______________ [red] _______________ ['silvə(r)]• _______________ ['ɡəuldən] _______________ [piŋk]• _______________ [braun] _______________ [blu:]• _______________ ['pə:pl] _______________ [ɡrei]• _______________ ['aivəri]_______________ [məˈtiəriəl]• _______________ ['leðə(r)] _______________ [klɔθ]• _______________ ['plæstik] _______________ ['rʌbə(r)]• _______________ [ˈmetl] _______________ [wud]_______________ ['tekstʃə(r)]• _______________ [sɔft]• _______________ [hɑ:d]• _______________ ['tendə(r)] _______________ [rʌf]• _______________ [smu:ð] _______________ ['stiki]_______________ [weit ənd ˈvɔlju:m]• _______________ ['sentiˌmi:tə] =(cm)• _______________ ['miliˌmi:tə] =mm• _______________ ['kiləˌmi:tə]=km• _______________ [intʃ] (1 _____ =25.4mm)• _______________ [mail] (1_____=1.609km)• _______________ [ɡræm]=g• _______________ [ˈkiləgræm] =kg.• _______________[paund] (1______=0.4536kg)• _______________ [tʌn]（1______ =1000kg）
- 设,[G1,*]和[G2,*]都是群[G,*]的正规子群, 则[G1G2,*]也是[G,*]的正规子群,其中G1G2=íg1*g2| g1ÎG1, g2ÎG2ý