若不等式2x<4的解都能使关于x的一次不等式(a-1)x<a+5成立,则a的取值范围是 [ ]
A.1<a≤7
B.a≤7
C.a<1或a≥7
D.a=7
答案:A
Although several months has gone by, Mary still has __________ memories of things and persons __________ she felt curious about at the wedding reception in Brunei.
A.equal, that
B.fond, /
C.worthwhile, whom
D.slight, which
下列说法正确的是( )
A.家庭电路中保险丝熔断后,短时间内可以用细铜丝代替
B.使用试电笔辨别火线时,手指不能接触金属笔卡
C.洗衣机使用三孔插座能防止人触电
D.电视机处于待机状态不消耗电能