投资者在决定投资某种证券前，首先应该认真评估该证券的投资价值，只有当证券处于投资价值区域时，投资该证券才是有的放矢。（）
参考答案：对
用所给词的正确形式填空。
1. I ___________ (have) a good time yesterday.
2. ___________ (do) you have a pencil?
3. Where ___________ (do) you go last weekend?
4. This is ___________ (I) school bag.
5. We ___________ (stay) at a small village last Friday.
6. My bag is ___________ (big) than ___________ (you).
异位妊娠未破损期的治疗应首选（）
A.参附汤
B.独参汤
C.宫外孕Ⅱ号方
D.宫外孕Ⅰ号方
E.桃红四物汤
