相纸的纸基抗水性较强,表现为(),晾干或烘干后不易收缩和变形。
参考答案:在水和药液浸泡后纸基膨胀和收缩率小
—I'm sorry that I shouted at you this morning.
—_____. But please don't get angry so easily. [ ]
A. That's true
B. That's right
C. That's OK
D. That's a deal
有下列金属:①Na;②Al;③Fe;④Cu.
(1)投入室温下的水中无明显现象的是______(填序号,下同).
(2)投入稀盐酸中无明显现象的是______.
(3)投入CuSO4溶液中无明显现象的是______.
(4)常温下能与空气中的O2快速反应的是______,只有在加热条件下才能反应的是______.