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【单选题】
不易造成接触镜沉淀物的是（）
A.
高含水镜片
B.
长戴镜片
C.
RGP镜片
D.
日抛镜片
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【单选题】分别向 Na 3 PO 4 , NaH 2 PO 4 , Na 2 HPO 4 三种溶液中滴加 AgNO 3 溶液 , 其沉淀物是 ( ) 。
A.
(A) 都是 Ag 3 PO 4
B.
(B) 分别是 Ag 3 PO 4 ,AgH 2 PO 4 , Ag 2 HPO 4
C.
(C) 都是 AgH 2 PO 4
D.
(D) 都是 Ag 2 HPO 4
【单选题】Passage Two There are some earth phenomena you can count on, but the magnetic field, some say, is not one of them. It fluctuates in strength, drifts from its axis, and every few 100,000 ...
A.
Polarity Reversal: A Fantastic Phenomenon of Nature.
B.
Measurement of the Earth’s Magnetic-Field Intensity.
C.
Formation of the Two Poles of the Earth.
D.
A New Approach to the Study of Geophysics.
相关题目：
【单选题】分别向 Na 3 PO 4 , NaH 2 PO 4 , Na 2 HPO 4 三种溶液中滴加 AgNO 3 溶液 , 其沉淀物是 ( ) 。
A.
(A) 都是 Ag 3 PO 4
B.
(B) 分别是 Ag 3 PO 4 ,AgH 2 PO 4 , Ag 2 HPO 4
C.
(C) 都是 AgH 2 PO 4
D.
(D) 都是 Ag 2 HPO 4
【单选题】Passage Two There are some earth phenomena you can count on, but the magnetic field, some say, is not one of them. It fluctuates in strength, drifts from its axis, and every few 100,000 ...
A.
Polarity Reversal: A Fantastic Phenomenon of Nature.
B.
Measurement of the Earth’s Magnetic-Field Intensity.
C.
Formation of the Two Poles of the Earth.
D.
A New Approach to the Study of Geophysics.
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