选购防爆膜时.可运用()、()、()、()等感官手段测试它的可见光透过率、隔热性、防爆性、颜色等。
参考答案:看;摸;闻;试
己知动点A,B分别在x轴和直y=x上,C为定点(2,1),则△ABC周长的最小值为______.
—How about camping this weekend, just for a change?
—OK, ________ you want.[ ]
A. whichever
B. however
C. whatever
D. whoever