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【简答题】

根据课文内容 ,完成下列短文。
My job is to travel to unusual places and meet interesting peo ple from all over the world. I use1
( science) instruments in my work and meet with local people and tourists, and I am never2( bore).
As a3 (火山学家), I collect information about Mount Kilauea. My job is4( occasion) erous;
I don't mind because er5(interest)me and makes me feel alive. As is known, when lava from the
volcano flows, many houses will be covered with lava or6burnt to the ground. All the lava7(pass)
slowly down the mountain causes more damage because it buries everything in its path under the molten
rock. I once experienced an8(火山爆发). When it broke out, red lava was9(喷) hundreds of metres
into the air, and it was an10( absolute)fantastic sight.

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【单选题】2008年9月,中国爆发三鹿婴幼儿奶粉受污染事件,导致食用了受污染奶粉的婴幼儿产生肾结石病症,其原因就是奶粉中含有三聚氰胺。下列描述属于三聚氰胺的化学性质的是 [ ]

A.
三聚氰胺性状为纯白色单斜棱晶体,无味;
B.
快速加热升华,升华温度300℃;
C.
溶于热水,微溶于冷水,极微溶于热乙醇;
D.
在一般情况下较稳定,但在高温下可能会分解放出氰化物。