Linked<br/>genes are A: found<br/>on the same chromosome B: found<br/>in the same nucleus C: found<br/>only on sex chromosomes D: joined<br/>by a centromere

In Asia and some countries around the Mediterranean Sea, it is not acceptable to have body contact between the same sex in public.

The use of same-sex classrooms can help boys to compete with girls.

We learn from the passage that ______. A: same-sex partners are still strongly looked down upon in UK B: same-sex partners in England and Wales are granted many of the legal rights enjoyed by married couples of different sexes C: same-sex partners are usually ashamed of their relationship D: many "gay marriages" have been declared void by British court

The most traditional family in north America is ______. A: Extended family B: Nuclear family C: Blended family D: Same-sex family

查询性别为男的信息，条件怎么写 A: where sex !=’男' B: where sex not in 男 C: where sex ='男' D: where sex between 男

d={'name':'alice','age':19,'sex':'F'},不能删除’sex’项目的操作的是（） A: del d['sex'] B: d.pop() C: d.pop('sex') D: d.clear()

查询天心区的男学生的信息，正确的命令是？ A: db.students.find({"address":"天心区"},{"sex":"男"}) B: db.students.find({"address":"天心区","sex":"男"}) C: db.students.find({$and:{"address":"天心区","sex":"男"}}) D: db.students.find({$and:[{"address":"天心区"},{"sex":"男"}]})

查询天心区的女学生的信息,正确的命令是? A: db.students.find({"address":"天心区"},{"sex":"女"}) B: db.students.find({"address":"天心区","sex":"女"}) C: db.students.find({$and:{"address":"天心区","sex":"女"}}) D: db.students.find({$and:[{"address":"天心区"},{"sex":"女"}]})

关系SC(S，SNAME，SEX，SCORE，CNAME)，从关系SC中检索男生(SEX =M)并且成绩大于等于60的学生姓名，下述表示( )是正确的。 Ⅰ．ЛSNAME(σSCORE＞60□SEX=’M’(SC)) Ⅱ．σSCORE＞=60□SEX=’M’(ЛSNAME(SC)) Ⅲ．ЛSNAME(σSCORE＞=60□SEX=’M’(ЛSNAME，SCORE，SEX(SC))) A: Ⅰ和Ⅱ B: Ⅱ C: Ⅰ和Ⅲ D: Ⅰ