在“平面镜成像”的试验中，

（1）用玻璃板不用镜子的目的是                                    ；

（2）用刻度尺的目的是比较物与像                                    ；

（3）用两段大小相同蜡烛的目的是比较物与像的          关系；

（4）移去B，并在B处放一光屏，则光屏上             （选填“能”或“不能”）成像，所以平面镜成的是           （选填“实”或“虚”）像；

（5）将A远离镜子，它的像的大小           （选填“变大”、“变小”、“不变”）．

A woman who is 10 weeks pregnant complains about her fatigue and frequent urination. What would be the nurse’s response（）

A. Recognize these as normal early pregnancy signs and symptoms.

B. Question her further about these signs and symptoms.

C. Tell the client that she’ll need blood work and urinalysis.

D. Tell the client that she may be excessively worried.