一般说来，社会收入差距越大，社会总体消费水平越低。 [ ]

取两块大小相同的干冰。在干冰中央挖一个小穴，撒入一些镁粉，用红热的铁棒把镁点燃，将另一块干冰盖上，你会看到镁粉在干冰内继续燃烧，发出耀眼的白光，像冰灯一样。已知该反应的生成物是氧化镁和碳。

干冰的化学式为_________；该实验证明干冰具有_____________________________________________的性质（答一条即可）；为验证上述反应所得固体中无剩余镁，可向该固体中加入试剂得名称为_________________________，反应的现象是___________________________________。

下列各项支出中，属于资本性支出的有：

A．购置固定资产支付的增值税

B．购入某项专利权的支出

C．支出给工程项目人员的工资

D．支付固定资产的修理费

E．支付的广告费

下列可以销售证券投资基金的是( )。

A．商业银行与保险公司

B．证券公司

C．金融咨询机构

D．基金管理公司

With hundreds of millions of electronic (46) taking place daily, businesses and organizations have a p incentive to protect the (47) of the data exchanged in this manner, and to positively ensure the (48) of those involved in the transactions. This has led to an industry-wide quest for better, more secure methods for controlling IT operations, and for deploying p security mechanisms deeply and broadly throughout networked infrastructures and client devices. One of the more successful concepts to engage the imaginations of the security community has been the development of standards-based security (49) that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in (50) and integrating security provisions at the deepest levels of the machine operation has significant benefits for both users and those responsible for securing IT operations.

A. software B. form C. computer D. silicon

某旅游团部分游客从景区游览回到饭店后，希望休息一阵，推迟用晚餐的时间，导游员应该（）。

A、婉言拒绝，耐心解释

B、征求全团游客意见

C、与餐厅联系，确定开餐时间

D、告知费用自理