针对新一轮房价的非理性上涨，国务院发出通知，要求实行更为严格的差别化住房信贷政策，房贷首付和利率均有较大幅度上调，部分地区可暂停发放购买第三套及以上住房贷款；研究制定引导个人合理住房消费和调节个人房产收益的税收政策；增加居住用地有效供应；加快保障性安居工程建设等，以坚决遏制部分城市房价过快上涨。下列能正确反映国家政策与房价之间关系的选项是

①利率上调→购房成本增加→购房需求下降→房价下跌

②安居工程建设→住房供给增加→住房供求矛盾缓解→房价下跌

③居住用地供应增加→建筑成本降低→住房供过于求→房价下跌

④上调房产收益税率→购房成本增加→购房需求下降→房价下跌

A．①②

B．①③

C．②④

D．③④

China is to send its top negotiator on North Korea’s nuclear program to Pyongyang (36) amid international concern over the launch of (37) .
While the (38) and its ally Japan push for (39) against North Korea, China is (40) , not sanctions.
Also, the (41) to Japan says sanctions on North Korea will (42) efforts to bring the secluded state back to (43) on its nuclear program.
North Korea (44) the six-party talks in (45) after Washington imposed financial sanctions for alleged counterfeiting and (46) activities.
A broadcast on North Korean State Television (47) the missile tests, in what it called a "successful (48) ".
It said North Korea will take action against anyone who (49) them.
The Minister is reported to have told a (50) that the missile launches were (51) because of America’s sanctions against Pyongyang.
North Korea remains (52) in the face of international condemnation and has warned (53) could be carried out.
UN Security Council members will (54) discussions tonight on whether a (55) condemning the missile launches should call for sanctions.