道岔表示电路中采用的是BD1-7型道岔表示变压器,其变压比为()。
A.1:1
B.2:1
C.3:1
D.4:1
参考答案:B
内旋转
—When did you last hear _____ Jay?
—He phoned me this morning, and we agreed____ a time and place to meet.
A.of, to
B.about, with
C.from, with
D.from, on