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【单选题】
Electrical engineers have repeatedly demonstrated that the best solid-state amplifiers are indistinguishable from the best vacuum-tube amplifiers with respect to the characteristics commonly measured in evaluating the quality of an amplifier’s musical reproduction. Therefore, those music lovers who insist that recorded music sounds better when played with the best vacuum-tube amplifier than when played with the best solid-state amplifier must be imagining the difference in quality that they claim to bear. Which one of the following, if true, most seriously weakens the argumentA.
Many people cannot tell from listening to it whether a recording is being played with a very good solid-state amplifier or a very good vacuum-tube amplifier.
B.
The range of variation with respect to the quality of musical reproduction is greater for vacuum-tube amplifiers than for solid-state amplifiers.
C.
Some of the characteristics that are important in determining how music sounds to a listener cannot be measured.
D.
Solid-state amplifiers are more compact, use less power, and generate less heat than vacuum-tube amplifiers that produce a comparable volume of sound.
E.
Some vacuum-tube amplifiers are clearly superior to some solid-state amplifiers with respect to the characteristics commonly measured in the laboratory to evaluate the quality of an amplifier’s musical reproduction.
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【多选题】有关药物排泄描述正确的有
A.
药物可自胆汁排泄，有的药物存在肝肠循环
B.
药物经肾小管分泌排泄为简单扩散
C.
碱化尿液可促进酸性药物经尿排泄
D.
粪中药物多数是口服未被吸收的药物
E.
肺脏是某些挥发性药物的主要排泄途径
【简答题】配制100ml 2%盐酸普鲁卡因溶液,已知1%盐酸普鲁卡因的冰点降低值为0.12°C,血浆的冰点降低值为0.52°C,1%NaCl溶液冰点降低值为0.58°C,则需要加入氯化钠才能等渗?
【单选题】配制100ml2%盐酸普鲁卡因溶液,已知1%盐酸普鲁卡因的冰点降低值为0.12°C,血浆的冰点降低值为0.52°C,1%NaCl溶液冰点降低值为0.58°C,则需要加入多少氯化钠才能等渗?
A.
0.9;
B.
0.12;
C.
0.24;
D.
0.48;
E.
0.6
【单选题】公路运输货物的托运人,在托运时应该完成( )。
A.
填写 “ 货物托运单 ”
B.
填写 “ 公路货物托运申请书 ”
C.
填写 “ 公路运输货物清单 ”
D.
填写 “ 公路运输委托书 ”
【多选题】2011年7月1日开始实施的《中华人民共和国社会保险法》对失业保障作了具体规定。下列表述正确的是（ ）。
A.
失业保险金的标准由省、自治区、直辖市人民政府确定
B.
失业保险金的标准不得低于城市居民最低生活保障标准
C.
失业人员在失业前用人单位和本人已缴纳失业保险费满两年的才可领取失业保险金
D.
只要是失业人员而且已按规定缴纳的失业保险费就都可以领取失业保险金
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