与巴比妥类相比，不是苯二氮类镇静催眠作用优点的是（） A.肝药酶诱导作用弱 B.安全

Some cleaning fluids, synthetic carpets, wall paneling, and other products release toxins, such as formaldehyde and benzene, into the household air supply. This is not a problem in well-ventilated houses, but it is a problem in houses that are so well insulated that they trap toxins as well as heat. Recent tests, however, demonstrate that houseplants remove some household-toxins from the air and thereby eliminate their danger. In one test, 20 large plants eliminated formaldehyde from a small, welt-insulated house. Assume that a person who lives in a small, well-insulated house that contains toxin-releasing products places houseplants, such as those tested, in the house.
Which one of the following can be expected as a result

A．There will no longer be any need to ventilate the house.

B．The concentration of toxins in the household air supply will remain the same.

C．The house will be warm and have a safe air supply.

D．If there is formaldehyde in the household air supply, its level will decrease.

E．(E) If formaldehyde and benzene are being released into the household air supply, the quantities released of each will decrease.

—Did you sleep ______ last night, Li Ping? 

—No, I slept ______ instead. [ ]

A. later; early      

B. late; early      

C. lately; early   

D. lately; early

某工程项目确定采用邀请招标的方式，监理单位在招标前经测算确定该工程标底为4000万元，定额工期为40个月，经研究、考察确定邀请4家具备承包该工程项目相应资质等级的施工企业参加投标。招标小组研究确定采用如下综合评分法评标的原则。

(1)评价的项目中各项评分的权重：报价占40%，工期占20%，施工组织设计占20%，企业信誉占10%，施工经验占10%。

(2)各单项评分时，满分均按100分计，计算分数值时取小数点后一位数。

(3)“报价”项的评分原则：以标底±5%(标底)值为合理报价，超过此范围则认为是不合理报价。计分是以标底标价为100分，标价每偏差-1%扣10分，偏差+1%扣15分。

(4)“工期”项的评分原则：以额定工期为准，提前15%为满分100分，依此每延后5%扣10分，超过额定工期者被淘汰。

(5)“企业信誉”项的评分原则：以企业近3年工程优良率为准，优良率100%为满分100分， 90%为90分，依此类推。

(6)“施工经验”项的评分原则：按企业近3年承建类似工程与全部承建工程项目的百分率计，100%为满分100分。

(7)“施工组织设计”由专家评分决定。

经审查，四家投标的施工企业的上述5项指标汇总见表6-3。

表6-3 指示汇总

[问题]

1．根据上述评分原则和各投标单位情况，对各投标单位的各评价项目推算出各项指标的应得分。

2．按综合评分法确定各投标单位的综合分数值。

3．优选出综合条件最好的投标单位作为中标单位。

硼酸是 ① 元酸。

DNS查询模式有几种，各自特点是什么？