封建文化的正统思想是被封建统治者利用和改造的(　　)

实验室中测量质量的仪器叫____ ，将它放在水平桌面上，游码移到零刻度后，发现指针如图(a)所示，这时应把平衡螺母向____ (选填“左”或“右”)调节使指针对准分度盘的中央；把某矿石放入它的左盘，使它重新平衡时，右盘中砝码和游码的位置如图(b)所示，则矿石的质量为____ 克，如需测出该矿石的密度，还需测量该矿石的____ 。

Mary: What are you going to do this weekend, Lucy?

Lucy:____much. How about you, Mary?

Mary: I'm going to buy my father a present for his fortieth birthday. Would you like to go with me?

Lucy: I'd love to, but where would you like to go shopping?

Mary:____place where they have many different stores.

Lucy: I hear a new shopping center just opened downtown.

Mary: That____great. What time would be good for you?

Lucy: How____2:30?

Mary: Sure. That would be fine.

Lucy: Where should we meet, then?

Mary :____meet just outside the shopping mall.

Lucy: OK. See you then.

Mary: See you.