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建构主义学习观认为，知识并还是对现实的准确表现，只是一种解释或假设，具有（）性。
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某企业上年末资产负债表部分项目的余额如下：货币资金230000元，应收账款 42450元，存货132000元，固定资产原价510000元，累计折旧183000元。该企业本年度发生下列经济业务：(1)购入A材料一批，买价为20000元，增值税额为3400元；购入B材料一批，买价为10000元，增值税额为1700元；购入A、B两种材料共发生运杂费900元，按材料的买价比例分配；材料的货款和运杂费共计36000元均以银行存款支付，材料已验收入库。(2)对企业行政管理部门使用的固定资产计提折113600元。(3)销售产品一批，售价为30000元，增值税税率为17%，货款尚未收到；该批产品的生产成本为22000元，销售产品应交纳的城市维护建设税及教育费附加为500元。 根据上述资料编制本年末的资产负债表，其中填列正确的项目有（）。
The Internet affords anonymity to its users, a blessing to privacy and freedom of speech. But that very anonymity is also behind the explosion of cyber-crime that has (1) across the Web.Can privacy be preserved (2) bringing safety and security to a world that seems increasingly (3) Last month, Howard Schmidt, the nation’s cyber-czar, offered the federal government a (4) to make the Web a safer place a "voluntary trusted identity" system that would be the high-tech (5) of a physical key, a fingerprint and a photo ID card, all rolled (6) one. The system might use a smart identity card, or a digital credential (7) to a specific computer, and would authenticate users at a range of online services.The idea is to (8) a federation of private online identity systems. User could (9) which system to join, and only registered users whose identities have been authenticated could navigate those systems. The approach contrasts with one that would require an Internet driver’s license (10) by the government.Google and Microsoft are among companies that already have these "single sign-on" systems that make it possible for users to (11) just once but use many different services.(12) , the approach would create a "walled garden" cyberspace, with safe "neighborhoods" and bright "streetlights" to establish a sense of a (13) community.Mr. Schmidt described it as a "voluntary ecosystem" in which "individuals and organizations can complete online transactions with (14) ,trusting the identities of each other and the identities of the infrastructrue (15) which the transaction runs".Still, the administration’s plan has (16) privacy rights activists. Some applaud the approach; others are concerned. It seems clear that such a scheme is an initiative push toward what would (17) be a compulsory Internet "drive’s license" mentality.The plan has also been greeted with (18) by some computer security experts, who worry that the "voluntary ecosystem" envisioned by Mr. Schmidt would still leave much of the Internet (19) . They argue that all Internet users should be (20) to register and identify themselves, in the same way that drivers must be licensed to drive on public roads. 3（）
在问题解决中常用的两种一般问题解决策略是：算法式的和（）式。
心理健康教育是通过心理辅导、（）、心理治疗及普及心理有关知识来增进人们的心理健康。
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