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【单选题】An elm in our backyard（7）the blight (枯萎病) this summer and dropped stone dead, leafless, almost overnight. One weekend（8）was a normal-looking elm, maybe a little bare in spots but（9）alarming, and the n...
A.
There are so many new books about dying that there are now special shelves set aside for them in bookshops, along with the health-diet and home-repair paperbacks. Some of them are so（1） with detailed information and step-by-step instructions for performing the function, that you’d think this was a new sort of（2）which all of us are now required to learn. The strongest impression the casual reader gets is that proper dying has become an extraordinary,（3）an exotic experience, something only the specially trained can do.
B.
（4）, you could be led to believe that we are the only（5）capable of being aware of death, and that when the rest of nature is experiencing the life cycle and dying, one generation after（6）, it is a different kind of process, done automatically and trivially, or more "natural", as we say.
【多选题】下列关于唐菖蒲说法正确的是
A.
属于鸢尾科唐菖蒲属多年生球根花卉，球茎扁圆形，有褐色膜质外皮。
B.
穗状花序顶生，每穗着花8-24朵，通常排成两列，自下而上依次开花。
C.
喜光性的短日照植物，短日照有利于花芽分化。
D.
唐菖蒲对空气中SO 2 有较强抗性，但对氟化物敏感。