需求法则是( )。
A.商品自身的价格变化而引起的商品需求的变化
B.商品自身价格所引起的
C.需求量与价格呈反向变化
D.商品需求发生变化
参考答案:C
建设项目风险最常见的非保险转移有( )。
A.业主将合同责任和风险转移给对方当事人
B.承包商进行项目分包
C.业主付款担保
D.工程保险
E.承包商履约担保
A lot of new technology _____ into schools to make learning more effective these years. [ ]
A. introduced
B. has introduced
C. was introduced
D. is being introduced