储蓄与投资恒等是总量平衡的公式,储蓄增长就会加速投资,而投资超过储蓄则会导致()。
A.需求不足
B.供给不足
C.通货膨胀
D.通货紧缩
参考答案:C
Hardly ______ off the bus when ______ an old friend who he hadn’t seen for years.
A.had he got, did he meet
B.had he got, he met
C.did he get, did he meet
D.he got, he met
直流电动机具有(),()和()等特点。