问题
选择题
They had a party _____ the evening of October l. [ ]
A. in
B. at
C. on
D. /
答案
答案：C
搜题请搜索小程序“爱下问搜题”
They had a party _____ the evening of October l. [ ]
A. in
B. at
C. on
D. /
答案：C
sin100πt （V）的 正弦交流电源，图中电流表内阻不计．副线圈接入“110V，60W”灯泡一只，且灯光正常发光．下列说法正确的是（ ）
/22 A