What is NOT true of the invisibility device？
A. It is made of a special material with unusual ability.
B. Microwaves bounce off it when they strike it.
C. Microwaves pass through it when they strike it.
D. It bends the microwaves all the way around until they reach the opposite side.
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若要从学生表中检索出jg并去掉重复记录，可使用如下SQL语句 SELECT______jg FROM student 请选出正确的选项完成该语句
ALL
B. *
C. ？
DISTINCT
The criticism of Mr. Burrows toward the scheme implies that
A. he is very angry for many of his apprentices' failing in acquiring the NVQ certificates.
B. those who have physical defects can impossibly pass the exams for NVQ.
C. the apprentices who have got NVQ certificates always choose to leave for an other place.
D. NVQ is so difficult that he has to spend more time in teaching the youngsters.
The stories of Sarah Orne Jewett are considered by many to be more authentically regional
A. elegantly
B. genuinely
C. intentionally
D. thoroughly
数列{an}的前n项和为Sn，则S5＝5/6。
A. 条件(1)充分，但条件(2)不充分。
B. 条件(2)充分，但条件(1)不充分。
C. 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分。
D. 条件(1)充分，条件(2)也充分。
E. 条件(1)和(2)单独都不充分，条件(1)和条件(2)联合起来也不充分。
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