妊娠合并心脏病的护理是
A．保护，改善心功能状况B．清洁灌肠，加速产程进展C．隔离护理D．第二产程腹压配合自然分娩E．产后母婴同室
参考答案：A
If nature does not provide man with the necessary material, it is the laboratory ____ he will turn to for it．
A．where
B．that
C．which
D．what
