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问题
填空题
原兽亚纲的代表动物有()和()。
答案
参考答案:
鸭嘴兽;针鼹
选择题
读句子,选择恰当的图片并将其字母填入题前括号内。
( ) 1. A: What's this?
B: It's a lion. It's fat and short.
( ) 2. Look at the bag. It's big.
( ) 3. A: What are they?
B: They are pandas. They are fat.
( ) 4. A: What's this?
B: It's an elephant. It's big.
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单项选择题
最常见的胰腺癌辅助诊断和随访项目是()
A.CEA
B.AFP
C.CA199
D.CA50
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