单级主减速器的装配调整顺序是主从动锥齿轮啮合调整(),差速器的装配调整()。
A.先后均可,先后均可
B.应反复校验,也应反复校验
C.在先,在后
D.在后,在先
参考答案:D
The noise from the top floor, loud and constant, of the meeting-room ______ can be clearly heard in our classroom.
A.to be decorated
B.having been decorated
C.being decorated
D.decorated
若某商品的出口原报价为100美元。为了防止汇率风险,买卖双方同意用欧元进行保值。签约时,汇率为1美元=1.0217欧元,付款时汇率变为1美元=1.0067欧元。问:进口商在付款时应支付多少美元?