下列史实按照其发生的先后顺序排列,正确的是
①卢沟桥事变 ②西安事变 ③辽沈战役 ④百团大战 [ ]
A、①②③④
B、③②①④
C、②①④③
D、②①③④
答案:C
—Hello! Would you like to go to the movie with me tonight?
—Sorry, I can’t. Dad won’t ________ me to go out in the evening.
A.offer
B.allow
C.bother
D.care
图示的电路中,电阻R1和R2串联接在AB两端,电压表并联接在R1两端.已知R1=10Ω,R2=20Ω,电压表示数为2.5V,则AB两端的电压U=______V.