根据流感病毒核蛋白抗原性的不同，流感病毒又可分为几型( )
A．1型B．2型C．3型D．4型E．5型
参考答案：C
用 _____ 光可以对人体进行透视。[ ]
A. C
B. X
C. IT
根据首字母，填出正确的单词。
1. Don't s _____ in class. Keep awake, please.
2. A g ______ has a very long neck. It's a beautiful animal.
3. A dolphin is very i ________ because it can act as people do.
4. It has an u _____ face. We are afraid of it.
5. The panda is very shy, so please be very q ________.
C. IT