They___________ the Palace Museum next week.
A:hope me to visit
B:hope visiting
C:hoped themselves to visit
D:hope to visit
教室里装有多盏电灯,每多开一盏灯,则教室内电路的( )
如图,在菱形ABCD中,对角线AC、BD相交于点O,E为AB的中点,且OE=a,则菱形ABCD的周长为( ).