以下可以用来检测邮箱地址的正则表达式是（）。 A: /^\w@\w\.\w$/ B: /^\w+@\w+\.(com|com.cn|net)$/ C: /^\w+@\w+.(com|com.cn|net)$/ D: /^\w+@\w+.\w$/

The most common division between primary and secondary education in the US is ___________.（ ） A: primary schools (Grade 1 to Grade 6) and middle schools (Grade 7 to Grade 12) B: elementary schools (Grade Kindergarten to Grade 8) and high schools (Grade 9 to Grade 12) C: elementary schools (Grade Kindergarten to Grade 3), middle schools (Grade 4 to Grade 6) and high schools (Grade 7 to Grade 12) D: grammar schools (Grade Kindergarten to Grade 6) and high schools (Grade 7 to Grade 12)

The private schools for primary-school children in Britain are called The Pre-prep schools and Prep schools in UK refer to ______. ( ）。 A: public elementary schools B: private elementary schools C: public middle schools D: private middle schools

以下正则表达式，能用来检测邮箱地址的是（）。 A: /^\D\w{5,15}$/ B: /^\d{11}$/ C: /^\w{6,16}$/ D: /^\w+@\w+\.(com|com.cn|reg|net)$/

图示机构自由度W的正确计算结果为()。 A: W=3×6-2×8-1=1 B: W=3×9-2×13=1 C: W=3×6-2×7-3=1 D: W=3×5-2×7=1

Which of the following does not exist in universities?( ) A: Professional schools B: Grammar schools C: Graduate schools D: Undergraduate schools

能够完全匹配字符串“kick”和“kick-off”的正则表达式包括： A: w{4}-w{3}|w{4} B: w{4}|w{4}-w{3} C: S+-S+|S+ D: w*?-?w*|w*

Which of the following schools would admit children without reference to their academic abilities?? A. Comprehensive schools;|C. Independent schools;|D. Grammar schools;|B. Secondary Schools;

In Britain,the division between grammar schools and vocational schools was ended by the introduction of comprehensive schools in the _______.

In Britain, the division between grammar schools and vocational schools wasended by the introduction of ______schools in the1960s.