妊娠合并心脏病产后何时结扎为宜()
A．产后24小时内
B．产后3天左右
C．产后一周左右进行
D．产后二周
E．产后一月内
参考答案：C
A．外汇汇率升高，人民币币值下降
B．外汇汇率降低，人民币币值上升
C．外汇汇率升高，人民币币值上升
D．外汇汇率降低，人民币币值下降
There______ a lot of snow in our city last year. [ ]
A. is
B. are
C. was
D. were
