遇到这种情况可以优先通行。
参考答案:对
--- Could you bring me that novel you _____________ me about when I dropped in on you?
--- Sorry, I can’t. I have given it to a friend.
A.told
B.would tell
C.had told
D.had been telling
以下有关放置像质计的说法正确的是()
A.原则上每一张射线底片都应放置像质计
B.周向曝光技术中,在至少每隔120º的位置上放置一个像质计
C.像质计一般放在射线底片的两端,像质计最细的金属丝应靠近端头处
D.以上都对