多尘、潮湿的场所或户外场所的照明开关，应选用瓷质防水拉线开关。
参考答案：对
During her visit to Paris, Mrs. Ma really enjoyed _____.
A．herself
B．himself
C．ourselves
D．themselves
用几何的方法解决代数问题的方法叫做解析几何。
