按贷款对象，消费贷款可分为买方信贷和卖方信贷，后者是发放给 ( )的贷款。A．金融

如果样本x1，x2，x3，…xn的平均数是 . x ，方差是M，那么样本3x1+2，3x2+2，3x3+2，…3xn+2的平均数是______，方差是______．

I’m ______ years old and it’s my ______ birthday today.

A．fifteen, fifteen

B．fifteen, fifteenth

C．fifteenth, fifteen

D．fifteenth, fifteenth

产生死锁的4个必要条件为：互斥条件、请求保持条件、 、环路条件。

A．永久性条件
B．相互等待条件
C．不可剥夺条件
D．资源均分条件

氯化氢的分子式（），沸点（），分子量（）。

Topic: Can shopping vouchers increase consumption

Questions for Reference:
1. To stimulate consumption, which is more effective, tax reduction or shopping vouchers
2. What are the major purposes of issuing shopping vouchers
3. In what way can the shopping vouchers best be distributed Shall every citizen be given the same amount of shopping vouchers or should the vouchers be limited to the lower-income people only