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【单选题】
世界卫生组织于1973年提出盲的标准是最好眼的最好矫正视力（）A.
＜0.05
B.
＜O.1
C.
＜O.02
D.
＜0.3
E.
＜O.03
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反馈参考答案：
举一反三
【单选题】500 毫升2：3：1液的配制方案()
A.
5%或10%葡萄糖500ml， 10%氯化钠30ml，5%碳酸氢钠47ml
B.
5%或10%葡萄糖500ml， 10%氯化钠15ml，5%碳酸氢钠24ml
C.
5%或10%葡萄糖500ml， 10%氯化钠20ml，5%碳酸氢钠33ml
D.
5%或10%葡萄糖500ml， 10%氯化钠20ml
【简答题】A little girl was given so many picture books on her sh birthday that her father. Who should have run his office and let her mother run the home, thought his daughter should give one or two of he...
【单选题】实验室需配制一种强酸溶液500mL，c (H + )=2mol/L，下列配制方法可行的是( )
A.
取100mL5mol/LH 2 SO 4 ，加入400mL水
B.
取200mL5mol/LHCl，加水稀释至500mL
C.
取200 mL5mol/LH 2 SO 4 ，加水稀释至500mL
D.
取100 mL5mol/LHNO 3 ，加水稀释至500mL
【多选题】实验室需配制一种强酸溶液500mL，c（H + ）=2mol/L，下列配制方法可行的是（ ）
A.
取100 mL 5mol/LH 2 SO 4 ，加入400mL水
B.
取200 mL 5mol/LHCl，加水稀释至500mL
C.
取100mL 5mol/LH 2 SO 4 ，加水稀释至500mL
D.
取100mL 5mol/LHNO 3 ，加水稀释至500mL
【单选题】Many a player who had been highly thought of has ________ from the tennis scene.A．disposedB．disapp
A.
3. Many a player who had been highly thought of has ________ from the tennis scene. A．disposed
B.
disappeared
C.
discouraged
D.
discarded
【单选题】— _____ are these clothes? —They are those _____ . [ ]
A.
Whose; player's
B.
Who's; player's
C.
Whose; players'
D.
Who's; players'
【简答题】Many a player who had been highly thought of ______ from the tennis scene．许多得到高度评价的运动员都已经从网球赛场上消失了。
【单选题】Many a player who had been highly thought of ______ from the tennis scene.
A.
have disappeared
B.
has disappeared
C.
disappear
【简答题】直接法配制500mlK2CrO7标准溶液,用500ml( )。
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