锉齿轮轮齿、链轮,应该使用().
A.扁锉
B.半圆锉
C.菱形锉
D.刀锉
参考答案:C
It was announced that only when the terrible disease was under control _____ to return to
their homes.
A.the residents would decide
B.would the residents decide
C.would the residents be decided
D.the residents would be decided
等额让出可让利益的让步方式的缺点是?