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【判断题】
19世纪末尔另辟蹊径,发明了“投影”的方法,碳原子的表示也有一定的顺序,排在最上方的碳原子编号最大,这样就方便的将整个糖结构反映到平面的纸张上,这是第一次将立体的糖分子结构在平面上表达出来,因此这种方法被称之为“尔投影法”。A.
正确
B.
错误
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举一反三
【简答题】PDB是当前最主要的蛋白质三维结构数据库,在最新版的PDB中如何检索蛋白质三维结构和其它相关信息?
【单选题】请读程序: main() { int a=1,b=2; printf("%d\n",a=a+1,a+6,b+2);} 则上面程序的输出结果是()。
A.
2
B.
3
C.
4
D.
1
【单选题】If a person from a high contact culture went to a place where the culture is low contact, how would they feel?
A.
The same, high contact and low contact don't have that much of an impact on our relationships with people.
B.
They would feel that everyone is cold and impersonal.
C.
They would feel that people are intruding on their personal space and being rude.
D.
None of the above
【单选题】To get a necessary reference letter for the scholarship, students must contact _______high schools in advance.
A.
they
B.
them
C.
their
D.
theirs
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